./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/Ackermann-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/Ackermann-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 24c3da6ed2fa1f6675634198ae6fe88b58d89aeeff26fce5568b93d74b6b0249 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:33,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:33,687 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-11-19 07:55:33,696 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:33,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:33,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:33,749 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:33,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:33,751 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:33,758 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:33,758 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:33,759 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-19 07:55:33,759 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-19 07:55:33,761 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-19 07:55:33,761 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-19 07:55:33,762 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-19 07:55:33,762 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-19 07:55:33,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:33,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-19 07:55:33,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:33,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:33,765 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-19 07:55:33,765 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-19 07:55:33,765 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-19 07:55:33,766 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:55:33,766 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:33,767 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-19 07:55:33,767 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:33,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:33,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:33,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:33,769 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:33,770 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-19 07:55:33,770 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c3da6ed2fa1f6675634198ae6fe88b58d89aeeff26fce5568b93d74b6b0249 [2023-11-19 07:55:34,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:34,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:34,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:34,073 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:34,073 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:34,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/termination-crafted/Ackermann-2.c [2023-11-19 07:55:37,196 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:37,426 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:37,427 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/sv-benchmarks/c/termination-crafted/Ackermann-2.c [2023-11-19 07:55:37,435 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/data/ad60d57a5/7aabf281cb1c43c48eb92152efc3f97b/FLAG241d6e2c5 [2023-11-19 07:55:37,451 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/data/ad60d57a5/7aabf281cb1c43c48eb92152efc3f97b [2023-11-19 07:55:37,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:37,456 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:37,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:37,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:37,464 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:37,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,466 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12fd2af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37, skipping insertion in model container [2023-11-19 07:55:37,466 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,487 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:37,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:37,696 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:37,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:37,727 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:37,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37 WrapperNode [2023-11-19 07:55:37,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:37,729 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:37,729 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:37,729 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:37,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,767 INFO L138 Inliner]: procedures = 5, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2023-11-19 07:55:37,768 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:37,769 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:37,769 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:37,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:37,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,785 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,786 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:37,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:37,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:37,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:37,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (1/1) ... [2023-11-19 07:55:37,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:37,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:37,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:37,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2023-11-19 07:55:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2023-11-19 07:55:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:37,952 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:37,954 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:38,127 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:38,137 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:38,137 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:55:38,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:38 BoogieIcfgContainer [2023-11-19 07:55:38,143 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:38,144 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-19 07:55:38,144 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-19 07:55:38,150 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-19 07:55:38,151 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:55:38,152 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 07:55:37" (1/3) ... [2023-11-19 07:55:38,153 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@41911eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:55:38, skipping insertion in model container [2023-11-19 07:55:38,153 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:55:38,154 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:37" (2/3) ... [2023-11-19 07:55:38,154 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@41911eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:55:38, skipping insertion in model container [2023-11-19 07:55:38,155 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:55:38,155 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:38" (3/3) ... [2023-11-19 07:55:38,157 INFO L332 chiAutomizerObserver]: Analyzing ICFG Ackermann-2.c [2023-11-19 07:55:38,235 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-19 07:55:38,235 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-19 07:55:38,236 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-19 07:55:38,236 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-19 07:55:38,236 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-19 07:55:38,237 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-19 07:55:38,237 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-19 07:55:38,237 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-19 07:55:38,243 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:55:38,274 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-11-19 07:55:38,274 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:55:38,275 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:55:38,283 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:55:38,284 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:55:38,284 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-19 07:55:38,285 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:55:38,288 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-11-19 07:55:38,289 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:55:38,289 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:55:38,290 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:55:38,290 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:55:38,302 INFO L748 eck$LassoCheckResult]: Stem: 14#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 4#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 17#L19true assume !!(main_~x~0#1 <= 28); 18#L20true assume !!(main_~y~0#1 <= 3); 13#L21true assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 19#L24true call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 8#$Ultimate##0true [2023-11-19 07:55:38,302 INFO L750 eck$LassoCheckResult]: Loop: 8#$Ultimate##0true ~m := #in~m;~n := #in~n; 6#L10true assume !(0 == ~m); 7#L11true assume !(0 == ~n); 9#L12true call #t~ret1 := Ack(~m, ~n - 1);< 8#$Ultimate##0true [2023-11-19 07:55:38,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1333323188, now seen corresponding path program 1 times [2023-11-19 07:55:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:38,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343482157] [2023-11-19 07:55:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:38,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:38,490 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:38,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:38,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:38,549 INFO L85 PathProgramCache]: Analyzing trace with hash 927715, now seen corresponding path program 1 times [2023-11-19 07:55:38,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:38,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104558664] [2023-11-19 07:55:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:38,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:38,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:38,593 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:38,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2020015126, now seen corresponding path program 1 times [2023-11-19 07:55:38,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:38,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569738678] [2023-11-19 07:55:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:38,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:38,639 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:38,676 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:38,937 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:38,938 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:38,938 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:38,938 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:38,938 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:38,939 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:38,939 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:38,940 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:38,940 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration1_Loop [2023-11-19 07:55:38,940 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:38,941 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:38,964 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:38,977 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:38,987 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:38,991 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:38,995 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:38,999 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,003 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,007 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,112 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:39,113 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:39,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:39,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:39,134 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:39,134 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:39,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-19 07:55:39,167 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:39,167 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:39,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:39,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:39,203 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:39,203 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:39,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-19 07:55:39,231 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:39,231 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~m=4} Honda state: {Ack_#in~m=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:39,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:39,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:39,265 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:39,266 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:39,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-19 07:55:39,290 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:39,290 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=0} Honda state: {Ack_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:39,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:39,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:39,321 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:39,321 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:39,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-19 07:55:39,336 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:39,337 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:39,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:39,354 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:39,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-19 07:55:39,361 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:39,361 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:39,392 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:39,392 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:39,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:39,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:39,434 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:39,434 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:39,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-19 07:55:39,472 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:39,472 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:39,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:39,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:39,513 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:39,514 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:39,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-19 07:55:39,539 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:39,539 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~n=0} Honda state: {Ack_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:39,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:39,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:39,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-19 07:55:39,575 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:39,575 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:39,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:39,637 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:39,650 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:39,650 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:39,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-19 07:55:39,727 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:39,727 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~n=-5} Honda state: {Ack_#in~n=-5} Generalized eigenvectors: [{Ack_#in~n=-1}, {Ack_#in~n=0}, {Ack_#in~n=0}] Lambdas: [1, 3, 9] Nus: [1, 0] [2023-11-19 07:55:39,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,824 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:39,824 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:39,825 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:39,825 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:39,825 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:39,825 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:39,825 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:39,825 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:39,825 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration1_Lasso [2023-11-19 07:55:39,826 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:39,826 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:39,828 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,832 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,835 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,838 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,841 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,844 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,848 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,851 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,855 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,858 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,871 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,874 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,885 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:39,888 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,006 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:40,006 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:40,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-19 07:55:40,017 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,017 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,042 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:40,042 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:40,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,071 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,078 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,079 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-11-19 07:55:40,108 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:40,108 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=0} Honda state: {Ack_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:40,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,141 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-19 07:55:40,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,148 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,160 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:40,160 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res#1=0} Honda state: {ULTIMATE.start_main_#res#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:40,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,175 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-19 07:55:40,179 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,179 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,196 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:40,196 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~r~0#1=0} Honda state: {ULTIMATE.start_main_~r~0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:40,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,214 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-19 07:55:40,217 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,217 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,236 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:40,236 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet4#1=0} Honda state: {ULTIMATE.start_main_#t~nondet4#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:40,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,258 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,265 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,265 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-19 07:55:40,308 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:40,308 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:40,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,334 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,337 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,337 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-19 07:55:40,359 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:40,360 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5#1=0} Honda state: {ULTIMATE.start_main_#t~ret5#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:40,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,387 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-11-19 07:55:40,391 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,391 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,407 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:40,407 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret6#1=0} Honda state: {ULTIMATE.start_#t~ret6#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:40,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2023-11-19 07:55:40,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,426 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-19 07:55:40,428 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,428 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,441 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:40,441 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:40,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,462 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,465 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:40,466 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-19 07:55:40,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,498 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-19 07:55:40,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:40,500 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:40,616 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:55:40,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:40,625 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:40,625 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:40,625 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:40,625 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:40,625 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:55:40,625 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,625 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:40,625 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:40,625 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration1_Lasso [2023-11-19 07:55:40,625 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:40,626 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:40,628 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,638 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,641 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,644 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,647 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,650 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,653 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,656 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,659 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,662 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,674 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,678 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,682 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,697 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:40,880 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:40,885 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:55:40,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,887 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-19 07:55:40,889 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:40,901 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:40,901 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:40,901 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:40,902 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:40,902 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:40,904 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:40,904 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:40,911 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:40,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2023-11-19 07:55:40,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,932 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-19 07:55:40,936 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:40,948 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:40,948 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:40,948 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:40,948 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:40,948 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:40,949 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:40,949 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:40,959 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:40,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2023-11-19 07:55:40,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:40,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,974 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-19 07:55:40,975 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:40,986 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:40,986 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:40,987 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:40,987 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:40,987 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:40,987 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:40,988 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:41,008 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2023-11-19 07:55:41,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,023 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-19 07:55:41,025 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,043 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,044 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:41,044 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,044 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:41,044 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,050 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:41,050 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:41,060 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2023-11-19 07:55:41,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,079 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,081 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,095 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,095 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:41,095 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,095 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:41,095 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-19 07:55:41,096 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:41,096 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:41,106 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2023-11-19 07:55:41,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,121 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-19 07:55:41,123 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,134 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,134 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:41,134 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,134 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:41,134 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,135 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:41,135 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:41,163 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2023-11-19 07:55:41,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,182 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-19 07:55:41,183 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,194 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,194 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:41,195 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,195 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:41,195 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,195 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:41,195 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:41,202 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2023-11-19 07:55:41,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,219 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,224 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-19 07:55:41,235 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,236 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:41,236 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,236 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:41,236 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,237 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:41,237 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:41,239 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:41,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,284 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-19 07:55:41,285 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,297 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,297 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:41,298 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,298 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:41,298 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,299 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:41,299 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:41,310 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2023-11-19 07:55:41,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,354 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-11-19 07:55:41,356 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,369 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,369 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,370 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-11-19 07:55:41,370 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,414 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2023-11-19 07:55:41,414 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2023-11-19 07:55:41,447 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:41,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,477 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,485 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2023-11-19 07:55:41,499 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,499 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:41,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,499 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:41,499 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,500 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:41,500 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:41,515 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:41,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,538 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-19 07:55:41,540 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,552 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,552 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:41,552 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,553 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:41,553 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,553 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:41,553 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:41,555 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:41,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2023-11-19 07:55:41,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,569 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2023-11-19 07:55:41,571 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:41,582 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:41,583 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:41,583 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-11-19 07:55:41,583 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:41,597 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2023-11-19 07:55:41,597 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2023-11-19 07:55:41,635 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:55:41,693 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2023-11-19 07:55:41,693 INFO L444 ModelExtractionUtils]: 2 out of 11 variables were initially zero. Simplification set additionally 6 variables to zero. [2023-11-19 07:55:41,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:41,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,745 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-11-19 07:55:41,746 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:55:41,769 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2023-11-19 07:55:41,769 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:55:41,770 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(Ack_#in~n) = 1*Ack_#in~n Supporting invariants [1*Ack_#in~n >= 0] [2023-11-19 07:55:41,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2023-11-19 07:55:41,813 INFO L156 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2023-11-19 07:55:41,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:41,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:41,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:41,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:41,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:42,053 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-19 07:55:42,057 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:42,287 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4). Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 50 states and 65 transitions. Complement of second has 13 states. [2023-11-19 07:55:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-19 07:55:42,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2023-11-19 07:55:42,300 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 6 letters. Loop has 4 letters. [2023-11-19 07:55:42,301 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:42,302 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 10 letters. Loop has 4 letters. [2023-11-19 07:55:42,302 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:42,302 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 6 letters. Loop has 8 letters. [2023-11-19 07:55:42,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:42,304 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 65 transitions. [2023-11-19 07:55:42,310 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-11-19 07:55:42,319 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 32 states and 43 transitions. [2023-11-19 07:55:42,321 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2023-11-19 07:55:42,321 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2023-11-19 07:55:42,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 43 transitions. [2023-11-19 07:55:42,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:55:42,324 INFO L218 hiAutomatonCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-11-19 07:55:42,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states and 43 transitions. [2023-11-19 07:55:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-11-19 07:55:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 07:55:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-11-19 07:55:42,367 INFO L240 hiAutomatonCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-11-19 07:55:42,367 INFO L428 stractBuchiCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-11-19 07:55:42,368 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-19 07:55:42,368 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 36 transitions. [2023-11-19 07:55:42,370 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-11-19 07:55:42,370 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:55:42,370 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:55:42,371 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:42,371 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:55:42,372 INFO L748 eck$LassoCheckResult]: Stem: 168#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 153#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 154#L19 assume !!(main_~x~0#1 <= 28); 169#L20 assume !!(main_~y~0#1 <= 3); 166#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 150#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 160#$Ultimate##0 ~m := #in~m;~n := #in~n; 155#L10 assume !(0 == ~m); 156#L11 assume 0 == ~n; 151#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 152#$Ultimate##0 [2023-11-19 07:55:42,372 INFO L750 eck$LassoCheckResult]: Loop: 152#$Ultimate##0 ~m := #in~m;~n := #in~n; 173#L10 assume !(0 == ~m); 172#L11 assume 0 == ~n; 148#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 152#$Ultimate##0 [2023-11-19 07:55:42,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:42,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2020015031, now seen corresponding path program 1 times [2023-11-19 07:55:42,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:42,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132990892] [2023-11-19 07:55:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:42,384 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:42,394 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:42,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash 927620, now seen corresponding path program 1 times [2023-11-19 07:55:42,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:42,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412831710] [2023-11-19 07:55:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:42,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:42,407 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:42,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1333503942, now seen corresponding path program 2 times [2023-11-19 07:55:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:42,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600726392] [2023-11-19 07:55:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600726392] [2023-11-19 07:55:42,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600726392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:42,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:42,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:55:42,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115720980] [2023-11-19 07:55:42,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:42,578 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:42,578 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:42,578 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:42,579 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:42,579 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:42,579 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:42,579 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:42,579 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:42,579 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration2_Loop [2023-11-19 07:55:42,580 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:42,580 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:42,581 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:42,584 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:42,587 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:42,590 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:42,593 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:42,596 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:42,603 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:42,609 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:42,674 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:42,675 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:42,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:42,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:42,676 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:42,685 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:42,685 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:42,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-19 07:55:42,709 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:42,709 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:42,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:42,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:42,736 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:42,740 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:42,740 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:42,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-19 07:55:42,768 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:42,768 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:42,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:42,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:42,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:42,789 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:42,791 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:42,792 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:42,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-19 07:55:42,820 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:42,820 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~n=0} Honda state: {Ack_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:42,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2023-11-19 07:55:42,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:42,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:42,841 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:42,845 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:42,845 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:42,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-19 07:55:42,884 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:42,884 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:42,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:42,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:42,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:42,910 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:42,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:42,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:42,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-19 07:55:42,952 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:42,952 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:42,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:42,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:42,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:42,979 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:42,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-19 07:55:42,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:42,984 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:43,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,044 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,048 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:43,048 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:43,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-19 07:55:43,094 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:43,094 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~m=-4} Honda state: {Ack_#in~m=-4} Generalized eigenvectors: [{Ack_#in~m=0}, {Ack_#in~m=0}, {Ack_#in~m=-1}] Lambdas: [0, 1, 1] Nus: [0, 0] [2023-11-19 07:55:43,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,124 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,127 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:43,128 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:43,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-19 07:55:43,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2023-11-19 07:55:43,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,157 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-19 07:55:43,159 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:43,159 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:43,174 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:55:43,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,189 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:43,189 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:43,189 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:43,189 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:43,189 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:55:43,189 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,190 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:43,190 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:43,190 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration2_Loop [2023-11-19 07:55:43,190 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:43,190 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:43,191 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:43,194 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:43,197 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:43,200 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:43,202 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:43,205 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:43,211 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:43,217 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:43,323 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:43,323 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:55:43,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,327 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,338 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:43,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2023-11-19 07:55:43,353 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:43,353 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:43,353 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:43,353 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:43,353 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:43,354 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:43,354 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:43,364 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:43,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,386 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,390 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:43,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2023-11-19 07:55:43,404 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:43,405 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:43,405 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:43,405 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:43,405 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:43,406 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:43,406 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:43,423 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:43,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,444 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,447 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:43,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2023-11-19 07:55:43,460 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:43,461 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:43,461 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:43,461 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:43,461 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:43,462 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:43,462 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:43,471 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:43,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,490 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,493 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:43,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2023-11-19 07:55:43,508 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:43,508 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:43,508 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:43,508 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:43,508 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:43,509 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:43,509 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:43,518 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:43,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,540 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,542 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:43,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2023-11-19 07:55:43,556 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:43,557 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:43,557 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:43,557 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:43,557 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:43,558 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:43,558 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:43,575 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:43,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,596 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,598 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:43,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2023-11-19 07:55:43,615 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:43,616 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:43,616 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:43,616 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-11-19 07:55:43,616 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:43,618 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2023-11-19 07:55:43,618 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:43,635 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:43,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,657 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,660 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:43,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2023-11-19 07:55:43,674 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:43,674 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:43,674 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:43,674 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:43,674 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:43,676 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:43,676 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:43,703 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:55:43,706 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:55:43,706 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-19 07:55:43,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:43,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:43,710 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:43,713 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:55:43,713 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:55:43,713 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:55:43,714 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(Ack_#in~n) = -2*Ack_#in~n + 1 Supporting invariants [] [2023-11-19 07:55:43,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2023-11-19 07:55:43,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:43,735 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:55:43,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:43,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:43,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:43,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:55:43,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:43,886 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-11-19 07:55:43,886 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 36 transitions. cyclomatic complexity: 10 Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:43,980 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 36 transitions. cyclomatic complexity: 10. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 63 states and 87 transitions. Complement of second has 13 states. [2023-11-19 07:55:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-19 07:55:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2023-11-19 07:55:43,983 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 10 letters. Loop has 4 letters. [2023-11-19 07:55:43,984 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:43,984 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 14 letters. Loop has 4 letters. [2023-11-19 07:55:43,985 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:43,985 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 10 letters. Loop has 8 letters. [2023-11-19 07:55:43,985 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:43,985 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 87 transitions. [2023-11-19 07:55:43,990 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2023-11-19 07:55:43,993 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 55 states and 79 transitions. [2023-11-19 07:55:43,994 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2023-11-19 07:55:43,994 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2023-11-19 07:55:43,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 79 transitions. [2023-11-19 07:55:43,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:55:43,995 INFO L218 hiAutomatonCegarLoop]: Abstraction has 55 states and 79 transitions. [2023-11-19 07:55:43,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 79 transitions. [2023-11-19 07:55:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-11-19 07:55:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 37 states have internal predecessors, (45), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-19 07:55:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2023-11-19 07:55:44,005 INFO L240 hiAutomatonCegarLoop]: Abstraction has 49 states and 69 transitions. [2023-11-19 07:55:44,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:44,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:44,009 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:44,062 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2023-11-19 07:55:44,063 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 52 states and 70 transitions. [2023-11-19 07:55:44,066 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2023-11-19 07:55:44,070 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 52 states to 50 states and 68 transitions. [2023-11-19 07:55:44,072 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2023-11-19 07:55:44,073 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2023-11-19 07:55:44,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 68 transitions. [2023-11-19 07:55:44,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:55:44,075 INFO L218 hiAutomatonCegarLoop]: Abstraction has 50 states and 68 transitions. [2023-11-19 07:55:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states and 68 transitions. [2023-11-19 07:55:44,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2023-11-19 07:55:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:55:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-11-19 07:55:44,088 INFO L240 hiAutomatonCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-19 07:55:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:44,089 INFO L428 stractBuchiCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-19 07:55:44,089 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-19 07:55:44,090 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 60 transitions. [2023-11-19 07:55:44,092 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2023-11-19 07:55:44,092 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:55:44,092 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:55:44,093 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:44,093 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2023-11-19 07:55:44,093 INFO L748 eck$LassoCheckResult]: Stem: 443#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 431#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 432#L19 assume !!(main_~x~0#1 <= 28); 444#L20 assume !!(main_~y~0#1 <= 3); 442#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 424#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 445#$Ultimate##0 ~m := #in~m;~n := #in~n; 448#L10 assume !(0 == ~m); 450#L11 assume 0 == ~n; 435#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 436#$Ultimate##0 [2023-11-19 07:55:44,093 INFO L750 eck$LassoCheckResult]: Loop: 436#$Ultimate##0 ~m := #in~m;~n := #in~n; 437#L10 assume !(0 == ~m); 433#L11 assume !(0 == ~n); 422#L12 call #t~ret1 := Ack(~m, ~n - 1);< 425#$Ultimate##0 ~m := #in~m;~n := #in~n; 455#L10 assume !(0 == ~m); 456#L11 assume 0 == ~n; 434#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 436#$Ultimate##0 [2023-11-19 07:55:44,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:44,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2020015031, now seen corresponding path program 3 times [2023-11-19 07:55:44,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:44,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688613374] [2023-11-19 07:55:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:44,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:44,104 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:44,112 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:44,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2065796710, now seen corresponding path program 1 times [2023-11-19 07:55:44,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:44,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912401338] [2023-11-19 07:55:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:44,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:44,122 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:44,128 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:44,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1358662628, now seen corresponding path program 1 times [2023-11-19 07:55:44,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:44,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895930721] [2023-11-19 07:55:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:44,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:44,153 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:44,324 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:44,325 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:44,325 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:44,325 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:44,325 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:44,325 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,325 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:44,326 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:44,326 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration3_Loop [2023-11-19 07:55:44,326 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:44,326 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:44,327 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:44,330 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:44,332 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:44,334 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:44,336 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:44,341 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:44,347 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:44,349 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:44,402 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:44,403 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:44,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,404 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,412 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:44,412 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:44,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2023-11-19 07:55:44,434 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:44,434 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:44,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Ended with exit code 0 [2023-11-19 07:55:44,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,448 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2023-11-19 07:55:44,450 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:44,451 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:44,462 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:44,462 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:44,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2023-11-19 07:55:44,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,475 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2023-11-19 07:55:44,476 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:44,476 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:44,487 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:44,487 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:44,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:44,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,505 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2023-11-19 07:55:44,506 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:44,506 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:44,518 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:44,519 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~n=0} Honda state: {Ack_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:44,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2023-11-19 07:55:44,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,535 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,545 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:44,545 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:44,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2023-11-19 07:55:44,560 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:44,560 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~n=1} Honda state: {Ack_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:44,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2023-11-19 07:55:44,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,578 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2023-11-19 07:55:44,580 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:44,580 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:44,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:44,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,621 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,624 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:44,624 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:44,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2023-11-19 07:55:44,660 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:44,661 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~m=-4} Honda state: {Ack_#in~m=-4} Generalized eigenvectors: [{Ack_#in~m=0}, {Ack_#in~m=0}, {Ack_#in~m=-1}] Lambdas: [0, 1, 1] Nus: [0, 0] [2023-11-19 07:55:44,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:44,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,680 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,684 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:44,684 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:44,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2023-11-19 07:55:44,712 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:44,712 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:44,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:44,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:44,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,732 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,736 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:44,736 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:44,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2023-11-19 07:55:44,764 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:44,764 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=0} Honda state: {Ack_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:44,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:45,011 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:45,011 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:45,011 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:45,012 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:45,012 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:45,012 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,012 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:45,012 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:45,012 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration3_Lasso [2023-11-19 07:55:45,013 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:45,013 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:45,015 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,021 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,026 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,029 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,032 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,035 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,049 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,052 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,060 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,063 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,066 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,071 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,074 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,077 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,185 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:45,185 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:45,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,186 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2023-11-19 07:55:45,188 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:45,188 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:45,202 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:45,202 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res#1=0} Honda state: {ULTIMATE.start_main_#res#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:45,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:45,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,221 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,228 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:45,229 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:45,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Waiting until timeout for monitored process [2023-11-19 07:55:45,244 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:45,244 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet4#1=0} Honda state: {ULTIMATE.start_main_#t~nondet4#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:45,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:45,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,263 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2023-11-19 07:55:45,265 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:45,266 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:45,279 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:45,279 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet3#1=0} Honda state: {ULTIMATE.start_main_#t~nondet3#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:45,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Ended with exit code 0 [2023-11-19 07:55:45,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,300 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2023-11-19 07:55:45,302 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:45,302 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:45,316 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:45,316 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:45,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Ended with exit code 0 [2023-11-19 07:55:45,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,331 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2023-11-19 07:55:45,336 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:45,336 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:45,350 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:45,350 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=0} Honda state: {Ack_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:45,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Ended with exit code 0 [2023-11-19 07:55:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,368 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,380 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:45,381 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:45,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Waiting until timeout for monitored process [2023-11-19 07:55:45,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:45,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Ended with exit code 0 [2023-11-19 07:55:45,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,429 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Waiting until timeout for monitored process [2023-11-19 07:55:45,432 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:45,432 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:45,468 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:55:45,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Ended with exit code 0 [2023-11-19 07:55:45,471 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:45,471 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:45,471 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:45,471 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:45,471 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:55:45,471 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,472 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:45,472 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:45,472 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration3_Lasso [2023-11-19 07:55:45,472 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:45,472 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:45,474 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,479 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,485 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,487 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,490 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,492 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,495 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,503 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,518 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,521 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,523 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,528 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,538 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,541 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:45,672 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:45,672 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:55:45,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,674 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,681 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:45,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Waiting until timeout for monitored process [2023-11-19 07:55:45,695 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:45,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:45,695 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:45,695 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:45,695 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:45,696 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:45,696 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:45,711 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:45,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Ended with exit code 0 [2023-11-19 07:55:45,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,729 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Waiting until timeout for monitored process [2023-11-19 07:55:45,731 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:45,743 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:45,743 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:45,743 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:45,743 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:45,743 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:45,744 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:45,744 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:45,745 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:45,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Ended with exit code 0 [2023-11-19 07:55:45,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,761 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Waiting until timeout for monitored process [2023-11-19 07:55:45,763 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:45,775 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:45,776 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:45,776 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:45,777 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:45,777 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:45,778 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:45,778 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:45,787 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:45,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:45,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,803 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Waiting until timeout for monitored process [2023-11-19 07:55:45,804 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:45,816 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:45,817 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:45,817 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:45,817 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:45,817 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:45,818 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:45,819 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:45,820 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:45,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Ended with exit code 0 [2023-11-19 07:55:45,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,835 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Waiting until timeout for monitored process [2023-11-19 07:55:45,837 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:45,849 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:45,849 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:45,850 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:45,850 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:45,850 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:45,850 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:45,850 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:45,852 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:45,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:45,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,867 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Waiting until timeout for monitored process [2023-11-19 07:55:45,869 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:45,882 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:45,882 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:45,882 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:45,882 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:45,882 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:45,883 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:45,883 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:45,884 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:45,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:45,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,899 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Waiting until timeout for monitored process [2023-11-19 07:55:45,900 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:45,912 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:45,912 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:45,912 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:45,912 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:45,915 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2023-11-19 07:55:45,915 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2023-11-19 07:55:45,922 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:45,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Ended with exit code 0 [2023-11-19 07:55:45,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:45,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,951 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Waiting until timeout for monitored process [2023-11-19 07:55:45,959 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:45,970 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:45,971 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:45,971 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-11-19 07:55:45,971 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:45,978 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2023-11-19 07:55:45,979 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2023-11-19 07:55:45,997 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:55:46,029 INFO L443 ModelExtractionUtils]: Simplification made 14 calls to the SMT solver. [2023-11-19 07:55:46,030 INFO L444 ModelExtractionUtils]: 0 out of 11 variables were initially zero. Simplification set additionally 8 variables to zero. [2023-11-19 07:55:46,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:46,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:46,032 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:46,040 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:55:46,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Waiting until timeout for monitored process [2023-11-19 07:55:46,083 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2023-11-19 07:55:46,084 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:55:46,084 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(Ack_#in~m) = 1*Ack_#in~m Supporting invariants [1*Ack_#in~m >= 0] [2023-11-19 07:55:46,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:46,111 INFO L156 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2023-11-19 07:55:46,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:46,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:55:46,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:46,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:55:46,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:46,449 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.5 stem predicates 4 loop predicates [2023-11-19 07:55:46,450 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 60 transitions. cyclomatic complexity: 19 Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:46,806 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 44 states and 60 transitions. cyclomatic complexity: 19. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 141 states and 197 transitions. Complement of second has 32 states. [2023-11-19 07:55:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 5 stem states 4 non-accepting loop states 1 accepting loop states [2023-11-19 07:55:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 54 transitions. [2023-11-19 07:55:46,810 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 54 transitions. Stem has 10 letters. Loop has 8 letters. [2023-11-19 07:55:46,810 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:46,810 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 54 transitions. Stem has 18 letters. Loop has 8 letters. [2023-11-19 07:55:46,811 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:46,811 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 54 transitions. Stem has 10 letters. Loop has 16 letters. [2023-11-19 07:55:46,811 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:46,812 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 141 states and 197 transitions. [2023-11-19 07:55:46,819 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2023-11-19 07:55:46,824 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 141 states to 87 states and 121 transitions. [2023-11-19 07:55:46,824 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 61 [2023-11-19 07:55:46,825 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 63 [2023-11-19 07:55:46,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 121 transitions. [2023-11-19 07:55:46,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:55:46,826 INFO L218 hiAutomatonCegarLoop]: Abstraction has 87 states and 121 transitions. [2023-11-19 07:55:46,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states and 121 transitions. [2023-11-19 07:55:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2023-11-19 07:55:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 53 states have internal predecessors, (60), 17 states have call successors, (17), 9 states have call predecessors, (17), 7 states have return successors, (23), 8 states have call predecessors, (23), 13 states have call successors, (23) [2023-11-19 07:55:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2023-11-19 07:55:46,850 INFO L240 hiAutomatonCegarLoop]: Abstraction has 71 states and 100 transitions. [2023-11-19 07:55:46,850 INFO L428 stractBuchiCegarLoop]: Abstraction has 71 states and 100 transitions. [2023-11-19 07:55:46,850 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-19 07:55:46,850 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 71 states and 100 transitions. [2023-11-19 07:55:46,852 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2023-11-19 07:55:46,856 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:55:46,856 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:55:46,857 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:46,858 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:55:46,859 INFO L748 eck$LassoCheckResult]: Stem: 758#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 740#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 741#L19 assume !!(main_~x~0#1 <= 28); 759#L20 assume !!(main_~y~0#1 <= 3); 754#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 730#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 760#$Ultimate##0 ~m := #in~m;~n := #in~n; 797#L10 assume !(0 == ~m); 798#L11 assume 0 == ~n; 739#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 756#$Ultimate##0 ~m := #in~m;~n := #in~n; 776#L10 assume !(0 == ~m); 734#L11 [2023-11-19 07:55:46,859 INFO L750 eck$LassoCheckResult]: Loop: 734#L11 assume !(0 == ~n); 733#L12 call #t~ret1 := Ack(~m, ~n - 1);< 743#$Ultimate##0 ~m := #in~m;~n := #in~n; 732#L10 assume !(0 == ~m); 734#L11 [2023-11-19 07:55:46,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash -90772997, now seen corresponding path program 4 times [2023-11-19 07:55:46,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:46,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360188880] [2023-11-19 07:55:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:46,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:46,869 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:46,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:46,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:46,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1259875, now seen corresponding path program 2 times [2023-11-19 07:55:46,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:46,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231428324] [2023-11-19 07:55:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:46,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:46,888 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:46,893 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:46,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:46,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1596942755, now seen corresponding path program 2 times [2023-11-19 07:55:46,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:46,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041046203] [2023-11-19 07:55:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:46,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:46,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:46,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:47,060 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:47,060 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:47,060 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:47,061 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:47,061 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:47,061 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:47,061 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:47,061 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:47,061 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration4_Loop [2023-11-19 07:55:47,061 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:47,062 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:47,063 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:47,067 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:47,072 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:47,075 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:47,085 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:47,096 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:47,202 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:47,203 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:47,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:47,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:47,206 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:47,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:47,213 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:47,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (78)] Waiting until timeout for monitored process [2023-11-19 07:55:47,238 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:47,239 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:47,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (78)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:47,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:47,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:47,261 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:47,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (79)] Waiting until timeout for monitored process [2023-11-19 07:55:47,264 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:47,264 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:47,278 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:47,278 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:47,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (79)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:47,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:47,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:47,297 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:47,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (80)] Waiting until timeout for monitored process [2023-11-19 07:55:47,298 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:47,299 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:47,313 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:47,313 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:47,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (80)] Ended with exit code 0 [2023-11-19 07:55:47,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:47,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:47,333 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:47,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (81)] Waiting until timeout for monitored process [2023-11-19 07:55:47,334 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:47,334 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:47,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (81)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:47,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:47,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:47,373 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:47,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (82)] Waiting until timeout for monitored process [2023-11-19 07:55:47,376 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:47,376 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:47,550 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:47,550 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~n=-8, Ack_~n=-8} Honda state: {Ack_#in~n=-8, Ack_~n=-8} Generalized eigenvectors: [{Ack_#in~n=0, Ack_~n=0}, {Ack_#in~n=0, Ack_~n=-1}, {Ack_#in~n=-1, Ack_~n=0}] Lambdas: [0, 1, 0] Nus: [0, 1] [2023-11-19 07:55:47,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (82)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:47,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:47,569 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:47,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (83)] Waiting until timeout for monitored process [2023-11-19 07:55:47,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:47,571 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:47,593 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:47,593 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=6, Ack_#in~m=6} Honda state: {Ack_~m=6, Ack_#in~m=6} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:47,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (83)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:47,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:47,609 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:47,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (84)] Waiting until timeout for monitored process [2023-11-19 07:55:47,610 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:47,611 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:47,625 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:47,625 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:47,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (84)] Ended with exit code 0 [2023-11-19 07:55:47,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Ended with exit code 0 [2023-11-19 07:55:47,984 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:47,984 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:47,984 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:47,984 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:47,984 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:47,984 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:47,984 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:47,984 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:47,984 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration4_Lasso [2023-11-19 07:55:47,984 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:47,985 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:47,986 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,004 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,009 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,023 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,025 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,027 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,029 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,033 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,035 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,038 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,040 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,043 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,218 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:48,218 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:48,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,220 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,228 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:48,229 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:48,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (85)] Waiting until timeout for monitored process [2023-11-19 07:55:48,256 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:48,256 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=0, Ack_#in~m=0} Honda state: {Ack_~m=23, Ack_#in~m=23} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:48,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (85)] Ended with exit code 0 [2023-11-19 07:55:48,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,273 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (86)] Waiting until timeout for monitored process [2023-11-19 07:55:48,276 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:48,276 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:48,290 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:48,290 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet3#1=0} Honda state: {ULTIMATE.start_main_#t~nondet3#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:48,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (86)] Ended with exit code 0 [2023-11-19 07:55:48,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,308 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (87)] Waiting until timeout for monitored process [2023-11-19 07:55:48,311 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:48,311 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:48,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (87)] Ended with exit code 0 [2023-11-19 07:55:48,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,345 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Waiting until timeout for monitored process [2023-11-19 07:55:48,347 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:48,347 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:48,467 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:55:48,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:48,470 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:48,471 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:48,471 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:48,471 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:48,471 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:55:48,471 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,471 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:48,471 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:48,471 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration4_Lasso [2023-11-19 07:55:48,471 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:48,471 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:48,473 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,482 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,485 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,488 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,502 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,505 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,508 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,512 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,515 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,531 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,533 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,535 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:48,703 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:48,703 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:55:48,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,705 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Waiting until timeout for monitored process [2023-11-19 07:55:48,707 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:48,720 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:48,720 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:48,720 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:48,720 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:48,720 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:48,721 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:48,721 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:48,722 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:48,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Ended with exit code 0 [2023-11-19 07:55:48,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,767 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Waiting until timeout for monitored process [2023-11-19 07:55:48,771 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:48,783 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:48,783 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:48,783 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:48,784 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:48,784 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:48,784 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:48,784 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:48,786 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:48,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:48,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,833 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Waiting until timeout for monitored process [2023-11-19 07:55:48,834 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:48,848 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:48,848 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:48,848 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:48,848 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:48,848 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:48,849 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:48,849 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:48,851 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:48,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Ended with exit code 0 [2023-11-19 07:55:48,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,896 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (92)] Waiting until timeout for monitored process [2023-11-19 07:55:48,900 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:48,911 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:48,912 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:48,912 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-11-19 07:55:48,912 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:48,922 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2023-11-19 07:55:48,923 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2023-11-19 07:55:48,955 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:55:48,985 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2023-11-19 07:55:48,985 INFO L444 ModelExtractionUtils]: 7 out of 16 variables were initially zero. Simplification set additionally 6 variables to zero. [2023-11-19 07:55:48,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:48,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,988 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,996 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:55:49,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (93)] Waiting until timeout for monitored process [2023-11-19 07:55:49,028 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2023-11-19 07:55:49,028 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:55:49,028 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(Ack_~n) = 1*Ack_~n Supporting invariants [1*Ack_~n >= 0] [2023-11-19 07:55:49,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (92)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:49,053 INFO L156 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2023-11-19 07:55:49,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:49,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:55:49,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:49,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:49,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:49,271 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.3 stem predicates 4 loop predicates [2023-11-19 07:55:49,271 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 71 states and 100 transitions. cyclomatic complexity: 34 Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:49,322 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 71 states and 100 transitions. cyclomatic complexity: 34. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 72 states and 101 transitions. Complement of second has 6 states. [2023-11-19 07:55:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2023-11-19 07:55:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2023-11-19 07:55:49,328 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 12 letters. Loop has 4 letters. [2023-11-19 07:55:49,328 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:49,328 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:55:49,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:49,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:55:49,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:49,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:49,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:49,533 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.3 stem predicates 4 loop predicates [2023-11-19 07:55:49,535 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 71 states and 100 transitions. cyclomatic complexity: 34 Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:49,583 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 71 states and 100 transitions. cyclomatic complexity: 34. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 72 states and 101 transitions. Complement of second has 6 states. [2023-11-19 07:55:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2023-11-19 07:55:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2023-11-19 07:55:49,587 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 12 letters. Loop has 4 letters. [2023-11-19 07:55:49,588 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:49,588 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:55:49,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:49,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:55:49,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:49,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:49,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:49,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (93)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:49,849 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.3 stem predicates 4 loop predicates [2023-11-19 07:55:49,849 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 71 states and 100 transitions. cyclomatic complexity: 34 Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:50,038 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 71 states and 100 transitions. cyclomatic complexity: 34. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 143 states and 193 transitions. Complement of second has 38 states. [2023-11-19 07:55:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 3 stem states 3 non-accepting loop states 2 accepting loop states [2023-11-19 07:55:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 41 transitions. [2023-11-19 07:55:50,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 41 transitions. Stem has 12 letters. Loop has 4 letters. [2023-11-19 07:55:50,042 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:50,042 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 41 transitions. Stem has 16 letters. Loop has 4 letters. [2023-11-19 07:55:50,043 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:50,043 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 41 transitions. Stem has 12 letters. Loop has 8 letters. [2023-11-19 07:55:50,044 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:50,045 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 143 states and 193 transitions. [2023-11-19 07:55:50,051 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 34 [2023-11-19 07:55:50,056 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 143 states to 100 states and 144 transitions. [2023-11-19 07:55:50,057 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2023-11-19 07:55:50,057 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2023-11-19 07:55:50,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 144 transitions. [2023-11-19 07:55:50,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:55:50,060 INFO L218 hiAutomatonCegarLoop]: Abstraction has 100 states and 144 transitions. [2023-11-19 07:55:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states and 144 transitions. [2023-11-19 07:55:50,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2023-11-19 07:55:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 74 states have internal predecessors, (83), 23 states have call successors, (23), 12 states have call predecessors, (23), 10 states have return successors, (34), 11 states have call predecessors, (34), 20 states have call successors, (34) [2023-11-19 07:55:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 140 transitions. [2023-11-19 07:55:50,077 INFO L240 hiAutomatonCegarLoop]: Abstraction has 98 states and 140 transitions. [2023-11-19 07:55:50,077 INFO L428 stractBuchiCegarLoop]: Abstraction has 98 states and 140 transitions. [2023-11-19 07:55:50,077 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-19 07:55:50,077 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 98 states and 140 transitions. [2023-11-19 07:55:50,079 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 32 [2023-11-19 07:55:50,080 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:55:50,080 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:55:50,081 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:50,081 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:55:50,082 INFO L748 eck$LassoCheckResult]: Stem: 1360#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1335#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 1336#L19 assume !!(main_~x~0#1 <= 28); 1361#L20 assume !!(main_~y~0#1 <= 3); 1353#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 1329#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 1342#$Ultimate##0 ~m := #in~m;~n := #in~n; 1333#L10 assume !(0 == ~m); 1334#L11 assume !(0 == ~n); 1341#L12 call #t~ret1 := Ack(~m, ~n - 1);< 1421#$Ultimate##0 ~m := #in~m;~n := #in~n; 1422#L10 assume 0 == ~m;#res := 1 + ~n; 1420#AckFINAL assume true; 1349#AckEXIT >#41#return; 1328#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 1330#$Ultimate##0 [2023-11-19 07:55:50,082 INFO L750 eck$LassoCheckResult]: Loop: 1330#$Ultimate##0 ~m := #in~m;~n := #in~n; 1417#L10 assume !(0 == ~m); 1416#L11 assume !(0 == ~n); 1347#L12 call #t~ret1 := Ack(~m, ~n - 1);< 1330#$Ultimate##0 [2023-11-19 07:55:50,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:50,083 INFO L85 PathProgramCache]: Analyzing trace with hash 35829878, now seen corresponding path program 1 times [2023-11-19 07:55:50,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:50,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100628355] [2023-11-19 07:55:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:50,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:50,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:55:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:50,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:50,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100628355] [2023-11-19 07:55:50,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100628355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:50,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908970061] [2023-11-19 07:55:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:50,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:50,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,243 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-11-19 07:55:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:50,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:55:50,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:50,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:50,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908970061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:50,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:50,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2023-11-19 07:55:50,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735548286] [2023-11-19 07:55:50,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:50,439 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:55:50,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash 927715, now seen corresponding path program 3 times [2023-11-19 07:55:50,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:50,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056062698] [2023-11-19 07:55:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:50,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:50,444 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:50,448 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:50,518 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:50,518 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:50,518 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:50,518 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:50,519 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:50,519 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,519 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:50,519 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:50,519 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration5_Loop [2023-11-19 07:55:50,519 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:50,519 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:50,521 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:50,533 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:50,540 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:50,548 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:50,551 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:50,558 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:50,561 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:50,564 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:50,638 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:50,638 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:50,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,640 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (95)] Waiting until timeout for monitored process [2023-11-19 07:55:50,642 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:50,642 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:50,655 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:50,656 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:50,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (95)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:50,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,673 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (96)] Waiting until timeout for monitored process [2023-11-19 07:55:50,674 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:50,674 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:50,704 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:50,704 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:50,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (96)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:50,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,725 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (97)] Waiting until timeout for monitored process [2023-11-19 07:55:50,727 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:50,727 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:50,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (97)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:50,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,764 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (98)] Waiting until timeout for monitored process [2023-11-19 07:55:50,765 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:50,765 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:50,814 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:50,814 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~n=-5} Honda state: {Ack_#in~n=-5} Generalized eigenvectors: [{Ack_#in~n=-1}, {Ack_#in~n=0}, {Ack_#in~n=0}] Lambdas: [1, 3, 9] Nus: [1, 0] [2023-11-19 07:55:50,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (98)] Ended with exit code 0 [2023-11-19 07:55:50,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,827 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (99)] Waiting until timeout for monitored process [2023-11-19 07:55:50,828 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:50,828 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:50,839 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:50,840 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:50,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (99)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:50,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,854 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (100)] Waiting until timeout for monitored process [2023-11-19 07:55:50,855 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:50,856 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:50,873 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:50,873 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~m=4} Honda state: {Ack_#in~m=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:50,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (100)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:50,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,890 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (101)] Waiting until timeout for monitored process [2023-11-19 07:55:50,891 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:50,891 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:50,903 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:50,903 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=0} Honda state: {Ack_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:50,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (101)] Ended with exit code 0 [2023-11-19 07:55:50,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,918 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (102)] Waiting until timeout for monitored process [2023-11-19 07:55:50,919 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:50,920 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:50,931 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:50,932 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~n=0} Honda state: {Ack_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:50,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (102)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:50,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:50,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:50,951 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:50,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (103)] Waiting until timeout for monitored process [2023-11-19 07:55:50,952 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:50,953 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:50,965 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:50,965 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:50,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (103)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:50,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:50,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:55:50,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:55:50,979 INFO L87 Difference]: Start difference. First operand 98 states and 140 transitions. cyclomatic complexity: 46 Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:55:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:51,083 INFO L93 Difference]: Finished difference Result 93 states and 124 transitions. [2023-11-19 07:55:51,083 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 93 states and 124 transitions. [2023-11-19 07:55:51,086 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2023-11-19 07:55:51,089 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 93 states to 87 states and 118 transitions. [2023-11-19 07:55:51,089 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2023-11-19 07:55:51,090 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2023-11-19 07:55:51,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 118 transitions. [2023-11-19 07:55:51,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:55:51,090 INFO L218 hiAutomatonCegarLoop]: Abstraction has 87 states and 118 transitions. [2023-11-19 07:55:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states and 118 transitions. [2023-11-19 07:55:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2023-11-19 07:55:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 64 states have internal predecessors, (70), 19 states have call successors, (19), 11 states have call predecessors, (19), 8 states have return successors, (25), 8 states have call predecessors, (25), 17 states have call successors, (25) [2023-11-19 07:55:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2023-11-19 07:55:51,100 INFO L240 hiAutomatonCegarLoop]: Abstraction has 84 states and 114 transitions. [2023-11-19 07:55:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:55:51,101 INFO L428 stractBuchiCegarLoop]: Abstraction has 84 states and 114 transitions. [2023-11-19 07:55:51,101 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-19 07:55:51,102 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 84 states and 114 transitions. [2023-11-19 07:55:51,103 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2023-11-19 07:55:51,103 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:55:51,103 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:55:51,111 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:51,111 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:51,111 INFO L748 eck$LassoCheckResult]: Stem: 1663#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1642#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 1643#L19 assume !!(main_~x~0#1 <= 28); 1664#L20 assume !!(main_~y~0#1 <= 3); 1654#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 1635#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 1665#$Ultimate##0 ~m := #in~m;~n := #in~n; 1709#L10 assume !(0 == ~m); 1644#L11 assume 0 == ~n; 1645#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 1655#$Ultimate##0 ~m := #in~m;~n := #in~n; 1681#L10 assume !(0 == ~m); 1705#L11 assume !(0 == ~n); 1657#L12 call #t~ret1 := Ack(~m, ~n - 1);< 1685#$Ultimate##0 ~m := #in~m;~n := #in~n; 1707#L10 assume !(0 == ~m); 1708#L11 assume 0 == ~n; 1656#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 1658#$Ultimate##0 ~m := #in~m;~n := #in~n; 1679#L10 assume 0 == ~m;#res := 1 + ~n; 1677#AckFINAL assume true; 1671#AckEXIT >#39#return; 1673#L11-2 #res := #t~ret0;havoc #t~ret0; 1687#AckFINAL assume true; 1684#AckEXIT >#41#return; 1668#L12-1 [2023-11-19 07:55:51,111 INFO L750 eck$LassoCheckResult]: Loop: 1668#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 1683#$Ultimate##0 ~m := #in~m;~n := #in~n; 1688#L10 assume !(0 == ~m); 1667#L11 assume 0 == ~n; 1660#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 1676#$Ultimate##0 ~m := #in~m;~n := #in~n; 1704#L10 assume !(0 == ~m); 1703#L11 assume !(0 == ~n); 1675#L12 call #t~ret1 := Ack(~m, ~n - 1);< 1702#$Ultimate##0 ~m := #in~m;~n := #in~n; 1700#L10 assume !(0 == ~m); 1701#L11 assume 0 == ~n; 1660#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 1676#$Ultimate##0 ~m := #in~m;~n := #in~n; 1704#L10 assume 0 == ~m;#res := 1 + ~n; 1659#AckFINAL assume true; 1662#AckEXIT >#39#return; 1673#L11-2 #res := #t~ret0;havoc #t~ret0; 1687#AckFINAL assume true; 1684#AckEXIT >#41#return; 1668#L12-1 [2023-11-19 07:55:51,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:51,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1889032852, now seen corresponding path program 1 times [2023-11-19 07:55:51,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:51,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702309477] [2023-11-19 07:55:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:51,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:51,135 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:51,146 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:51,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:51,146 INFO L85 PathProgramCache]: Analyzing trace with hash 746066103, now seen corresponding path program 1 times [2023-11-19 07:55:51,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:51,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971617633] [2023-11-19 07:55:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:51,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:51,156 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:51,166 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:51,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash -594947422, now seen corresponding path program 1 times [2023-11-19 07:55:51,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:51,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525710790] [2023-11-19 07:55:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:51,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:51,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:55:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:51,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:51,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-19 07:55:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:51,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:55:51,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:51,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525710790] [2023-11-19 07:55:51,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525710790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:51,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358447476] [2023-11-19 07:55:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:51,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:51,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:51,931 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:51,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2023-11-19 07:55:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:51,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:55:51,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-19 07:55:52,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 33 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 07:55:52,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358447476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:52,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:52,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 30 [2023-11-19 07:55:52,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743088610] [2023-11-19 07:55:52,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:53,101 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:53,102 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:53,102 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:53,102 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:53,102 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:53,102 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:53,103 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:53,103 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:53,103 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration6_Loop [2023-11-19 07:55:53,103 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:53,103 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:53,104 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,111 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,136 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,139 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,152 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,155 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,159 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,162 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,242 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:53,243 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:53,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:53,246 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:53,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:53,253 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:53,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (105)] Waiting until timeout for monitored process [2023-11-19 07:55:53,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (105)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:53,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:53,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:53,304 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:53,308 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:53,308 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:53,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (106)] Waiting until timeout for monitored process [2023-11-19 07:55:53,338 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:55:53,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (106)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:53,357 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:53,357 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:53,358 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:53,358 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:53,358 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:55:53,358 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:53,358 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:53,358 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:53,358 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration6_Loop [2023-11-19 07:55:53,358 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:53,358 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:53,359 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,361 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,367 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,370 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,375 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,378 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,381 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,383 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:53,459 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:53,459 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:55:53,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:53,461 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:53,468 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:53,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (107)] Waiting until timeout for monitored process [2023-11-19 07:55:53,484 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:53,484 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:53,484 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:53,484 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:53,484 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:53,485 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:53,485 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:53,499 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:55:53,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (107)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:53,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:53,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:53,523 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:53,526 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:55:53,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (108)] Waiting until timeout for monitored process [2023-11-19 07:55:53,542 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:55:53,542 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:55:53,542 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:55:53,542 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:55:53,543 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:55:53,544 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:55:53,544 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:55:53,559 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:55:53,573 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:55:53,574 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:55:53,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:53,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:53,576 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:53,578 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:55:53,578 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:55:53,578 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:55:53,579 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(Ack_~m) = 1*Ack_~m Supporting invariants [] [2023-11-19 07:55:53,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (109)] Waiting until timeout for monitored process [2023-11-19 07:55:53,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (108)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:53,602 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:55:53,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:53,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:53,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:53,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (109)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:53,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:55:53,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:55:54,151 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2023-11-19 07:55:54,152 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 84 states and 114 transitions. cyclomatic complexity: 33 Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:55:54,432 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 84 states and 114 transitions. cyclomatic complexity: 33. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Result 182 states and 255 transitions. Complement of second has 31 states. [2023-11-19 07:55:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-19 07:55:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:55:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 33 transitions. [2023-11-19 07:55:54,436 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 33 transitions. Stem has 25 letters. Loop has 20 letters. [2023-11-19 07:55:54,438 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:54,438 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:55:54,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:54,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:54,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:54,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:55:54,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:55:54,855 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2023-11-19 07:55:54,855 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 84 states and 114 transitions. cyclomatic complexity: 33 Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:55:55,324 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 84 states and 114 transitions. cyclomatic complexity: 33. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Result 290 states and 428 transitions. Complement of second has 49 states. [2023-11-19 07:55:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-19 07:55:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:55:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 46 transitions. [2023-11-19 07:55:55,329 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 46 transitions. Stem has 25 letters. Loop has 20 letters. [2023-11-19 07:55:55,329 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:55,329 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 46 transitions. Stem has 45 letters. Loop has 20 letters. [2023-11-19 07:55:55,331 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:55,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 46 transitions. Stem has 25 letters. Loop has 40 letters. [2023-11-19 07:55:55,335 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:55:55,335 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 290 states and 428 transitions. [2023-11-19 07:55:55,343 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 47 [2023-11-19 07:55:55,362 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 290 states to 229 states and 353 transitions. [2023-11-19 07:55:55,362 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 130 [2023-11-19 07:55:55,365 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 132 [2023-11-19 07:55:55,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 229 states and 353 transitions. [2023-11-19 07:55:55,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:55:55,366 INFO L218 hiAutomatonCegarLoop]: Abstraction has 229 states and 353 transitions. [2023-11-19 07:55:55,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states and 353 transitions. [2023-11-19 07:55:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 214. [2023-11-19 07:55:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 137 states have (on average 1.197080291970803) internal successors, (164), 153 states have internal predecessors, (164), 49 states have call successors, (60), 24 states have call predecessors, (60), 28 states have return successors, (105), 36 states have call predecessors, (105), 42 states have call successors, (105) [2023-11-19 07:55:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 329 transitions. [2023-11-19 07:55:55,417 INFO L240 hiAutomatonCegarLoop]: Abstraction has 214 states and 329 transitions. [2023-11-19 07:55:55,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:55:55,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:55:55,420 INFO L87 Difference]: Start difference. First operand 214 states and 329 transitions. Second operand has 30 states, 26 states have (on average 2.076923076923077) internal successors, (54), 20 states have internal predecessors, (54), 8 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (12), 9 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-19 07:55:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:56,433 INFO L93 Difference]: Finished difference Result 258 states and 376 transitions. [2023-11-19 07:55:56,433 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 258 states and 376 transitions. [2023-11-19 07:55:56,438 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 60 [2023-11-19 07:55:56,447 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 258 states to 254 states and 372 transitions. [2023-11-19 07:55:56,447 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 161 [2023-11-19 07:55:56,448 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 161 [2023-11-19 07:55:56,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 254 states and 372 transitions. [2023-11-19 07:55:56,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:55:56,448 INFO L218 hiAutomatonCegarLoop]: Abstraction has 254 states and 372 transitions. [2023-11-19 07:55:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states and 372 transitions. [2023-11-19 07:55:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2023-11-19 07:55:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 156 states have (on average 1.1538461538461537) internal successors, (180), 171 states have internal predecessors, (180), 55 states have call successors, (65), 28 states have call predecessors, (65), 33 states have return successors, (117), 44 states have call predecessors, (117), 48 states have call successors, (117) [2023-11-19 07:55:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 362 transitions. [2023-11-19 07:55:56,486 INFO L240 hiAutomatonCegarLoop]: Abstraction has 244 states and 362 transitions. [2023-11-19 07:55:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:55:56,487 INFO L428 stractBuchiCegarLoop]: Abstraction has 244 states and 362 transitions. [2023-11-19 07:55:56,487 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-19 07:55:56,488 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 244 states and 362 transitions. [2023-11-19 07:55:56,490 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 59 [2023-11-19 07:55:56,491 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:55:56,491 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:55:56,492 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:56,493 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:55:56,493 INFO L748 eck$LassoCheckResult]: Stem: 3462#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 3444#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 3445#L19 assume !!(main_~x~0#1 <= 28); 3473#L20 assume !!(main_~y~0#1 <= 3); 3461#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 3438#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 3474#$Ultimate##0 ~m := #in~m;~n := #in~n; 3513#L10 assume !(0 == ~m); 3514#L11 assume 0 == ~n; 3506#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 3510#$Ultimate##0 ~m := #in~m;~n := #in~n; 3504#L10 assume !(0 == ~m); 3508#L11 assume !(0 == ~n); 3495#L12 call #t~ret1 := Ack(~m, ~n - 1);< 3494#$Ultimate##0 ~m := #in~m;~n := #in~n; 3496#L10 assume !(0 == ~m); 3552#L11 assume 0 == ~n; 3507#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 3468#$Ultimate##0 ~m := #in~m;~n := #in~n; 3509#L10 assume 0 == ~m;#res := 1 + ~n; 3553#AckFINAL assume true; 3550#AckEXIT >#39#return; 3548#L11-2 #res := #t~ret0;havoc #t~ret0; 3546#AckFINAL assume true; 3544#AckEXIT >#41#return; 3537#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 3574#$Ultimate##0 ~m := #in~m;~n := #in~n; 3576#L10 assume !(0 == ~m); 3577#L11 assume !(0 == ~n); 3586#L12 call #t~ret1 := Ack(~m, ~n - 1);< 3591#$Ultimate##0 ~m := #in~m;~n := #in~n; 3590#L10 assume !(0 == ~m); 3589#L11 assume !(0 == ~n); 3466#L12 [2023-11-19 07:55:56,493 INFO L750 eck$LassoCheckResult]: Loop: 3466#L12 call #t~ret1 := Ack(~m, ~n - 1);< 3584#$Ultimate##0 ~m := #in~m;~n := #in~n; 3580#L10 assume !(0 == ~m); 3581#L11 assume !(0 == ~n); 3466#L12 [2023-11-19 07:55:56,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:56,494 INFO L85 PathProgramCache]: Analyzing trace with hash -214609178, now seen corresponding path program 2 times [2023-11-19 07:55:56,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:56,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453032464] [2023-11-19 07:55:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:56,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:56,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:55:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:56,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:55:56,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:56,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453032464] [2023-11-19 07:55:56,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453032464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:56,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377391742] [2023-11-19 07:55:56,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:56,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:56,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:56,698 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:56,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2023-11-19 07:55:56,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:56,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:56,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:55:56,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 07:55:56,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:55:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377391742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:56,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:56,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 10 [2023-11-19 07:55:56,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621896449] [2023-11-19 07:55:56,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:56,919 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:55:56,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2115295, now seen corresponding path program 4 times [2023-11-19 07:55:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:56,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559961629] [2023-11-19 07:55:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:56,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:56,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:56,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:57,017 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:55:57,017 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:55:57,018 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:55:57,018 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:55:57,018 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:55:57,018 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:57,018 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:55:57,018 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:55:57,019 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration7_Loop [2023-11-19 07:55:57,019 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:55:57,019 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:55:57,020 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:57,023 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:57,025 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:57,032 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:57,040 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:57,043 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:55:57,136 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:55:57,136 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:55:57,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:57,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:57,138 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:57,144 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:57,144 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:57,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (111)] Waiting until timeout for monitored process [2023-11-19 07:55:57,176 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:57,176 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:57,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (111)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:57,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:57,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:57,198 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:57,205 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:57,205 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:57,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (112)] Waiting until timeout for monitored process [2023-11-19 07:55:57,229 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:57,229 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:57,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (112)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:57,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:57,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:57,273 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:57,277 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:57,277 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:57,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (113)] Waiting until timeout for monitored process [2023-11-19 07:55:57,320 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:57,320 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=6, Ack_#in~m=6} Honda state: {Ack_~m=6, Ack_#in~m=6} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:57,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (113)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:57,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:57,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:57,344 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:57,348 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:57,348 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:57,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (114)] Waiting until timeout for monitored process [2023-11-19 07:55:57,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (114)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:57,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:57,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:57,414 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:57,420 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:55:57,420 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:57,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (115)] Waiting until timeout for monitored process [2023-11-19 07:55:57,658 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:57,659 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~n=0, Ack_~n=-4} Honda state: {Ack_#in~n=0, Ack_~n=-4} Generalized eigenvectors: [{Ack_#in~n=-4, Ack_~n=0}, {Ack_#in~n=0, Ack_~n=-1}, {Ack_#in~n=-1, Ack_~n=0}] Lambdas: [0, 1, 0] Nus: [0, 1] [2023-11-19 07:55:57,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (115)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:57,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:57,683 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:57,686 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:57,686 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:57,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (116)] Waiting until timeout for monitored process [2023-11-19 07:55:57,711 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:57,711 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:57,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (116)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:57,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:55:57,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:57,733 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:57,736 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:55:57,736 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:55:57,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (117)] Waiting until timeout for monitored process [2023-11-19 07:55:57,750 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:55:57,750 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:55:57,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (117)] Ended with exit code 0 [2023-11-19 07:55:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:55:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:55:57,765 INFO L87 Difference]: Start difference. First operand 244 states and 362 transitions. cyclomatic complexity: 124 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:55:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:57,862 INFO L93 Difference]: Finished difference Result 151 states and 218 transitions. [2023-11-19 07:55:57,862 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 151 states and 218 transitions. [2023-11-19 07:55:57,866 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2023-11-19 07:55:57,869 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 151 states to 143 states and 201 transitions. [2023-11-19 07:55:57,870 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 111 [2023-11-19 07:55:57,870 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 111 [2023-11-19 07:55:57,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 201 transitions. [2023-11-19 07:55:57,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:55:57,871 INFO L218 hiAutomatonCegarLoop]: Abstraction has 143 states and 201 transitions. [2023-11-19 07:55:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states and 201 transitions. [2023-11-19 07:55:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2023-11-19 07:55:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 93 states have internal predecessors, (101), 28 states have call successors, (28), 17 states have call predecessors, (28), 20 states have return successors, (61), 26 states have call predecessors, (61), 26 states have call successors, (61) [2023-11-19 07:55:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 190 transitions. [2023-11-19 07:55:57,881 INFO L240 hiAutomatonCegarLoop]: Abstraction has 137 states and 190 transitions. [2023-11-19 07:55:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:57,882 INFO L428 stractBuchiCegarLoop]: Abstraction has 137 states and 190 transitions. [2023-11-19 07:55:57,882 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2023-11-19 07:55:57,883 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 137 states and 190 transitions. [2023-11-19 07:55:57,885 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2023-11-19 07:55:57,885 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:55:57,885 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:55:57,911 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:57,911 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [16, 14, 10, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3] [2023-11-19 07:55:57,912 INFO L748 eck$LassoCheckResult]: Stem: 4075#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 4045#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 4046#L19 assume !!(main_~x~0#1 <= 28); 4084#L20 assume !!(main_~y~0#1 <= 3); 4074#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 4050#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 4085#$Ultimate##0 ~m := #in~m;~n := #in~n; 4132#L10 assume !(0 == ~m); 4128#L11 assume 0 == ~n; 4069#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 4116#$Ultimate##0 ~m := #in~m;~n := #in~n; 4114#L10 assume !(0 == ~m); 4112#L11 assume !(0 == ~n); 4090#L12 call #t~ret1 := Ack(~m, ~n - 1);< 4100#$Ultimate##0 ~m := #in~m;~n := #in~n; 4123#L10 assume !(0 == ~m); 4089#L11 assume 0 == ~n; 4072#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 4082#$Ultimate##0 ~m := #in~m;~n := #in~n; 4114#L10 assume !(0 == ~m); 4112#L11 assume !(0 == ~n); 4090#L12 call #t~ret1 := Ack(~m, ~n - 1);< 4100#$Ultimate##0 ~m := #in~m;~n := #in~n; 4123#L10 assume !(0 == ~m); 4089#L11 assume 0 == ~n; 4072#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 4082#$Ultimate##0 ~m := #in~m;~n := #in~n; 4115#L10 assume 0 == ~m;#res := 1 + ~n; 4140#AckFINAL assume true; 4137#AckEXIT >#39#return; 4135#L11-2 #res := #t~ret0;havoc #t~ret0; 4134#AckFINAL assume true; 4133#AckEXIT >#41#return; 4130#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 4131#$Ultimate##0 ~m := #in~m;~n := #in~n; 4139#L10 assume 0 == ~m;#res := 1 + ~n; 4136#AckFINAL assume true; 4129#AckEXIT >#43#return; 4127#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4126#AckFINAL assume true; 4113#AckEXIT >#39#return; 4108#L11-2 #res := #t~ret0;havoc #t~ret0; 4106#AckFINAL assume true; 4104#AckEXIT >#41#return; 4063#L12-1 [2023-11-19 07:55:57,912 INFO L750 eck$LassoCheckResult]: Loop: 4063#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 4099#$Ultimate##0 ~m := #in~m;~n := #in~n; 4091#L10 assume !(0 == ~m); 4093#L11 assume 0 == ~n; 4043#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 4079#$Ultimate##0 ~m := #in~m;~n := #in~n; 4124#L10 assume !(0 == ~m); 4122#L11 assume !(0 == ~n); 4065#L12 call #t~ret1 := Ack(~m, ~n - 1);< 4066#$Ultimate##0 ~m := #in~m;~n := #in~n; 4120#L10 assume !(0 == ~m); 4117#L11 assume 0 == ~n; 4043#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 4079#$Ultimate##0 ~m := #in~m;~n := #in~n; 4124#L10 assume !(0 == ~m); 4122#L11 assume !(0 == ~n); 4065#L12 call #t~ret1 := Ack(~m, ~n - 1);< 4066#$Ultimate##0 ~m := #in~m;~n := #in~n; 4120#L10 assume !(0 == ~m); 4119#L11 assume !(0 == ~n); 4055#L12 call #t~ret1 := Ack(~m, ~n - 1);< 4060#$Ultimate##0 ~m := #in~m;~n := #in~n; 4061#L10 assume !(0 == ~m); 4056#L11 assume !(0 == ~n); 4054#L12 call #t~ret1 := Ack(~m, ~n - 1);< 4060#$Ultimate##0 ~m := #in~m;~n := #in~n; 4061#L10 assume !(0 == ~m); 4056#L11 assume !(0 == ~n); 4054#L12 call #t~ret1 := Ack(~m, ~n - 1);< 4060#$Ultimate##0 ~m := #in~m;~n := #in~n; 4061#L10 assume !(0 == ~m); 4053#L11 assume 0 == ~n; 4042#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 4079#$Ultimate##0 ~m := #in~m;~n := #in~n; 4124#L10 assume !(0 == ~m); 4122#L11 assume !(0 == ~n); 4065#L12 call #t~ret1 := Ack(~m, ~n - 1);< 4066#$Ultimate##0 ~m := #in~m;~n := #in~n; 4120#L10 assume !(0 == ~m); 4117#L11 assume 0 == ~n; 4043#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 4079#$Ultimate##0 ~m := #in~m;~n := #in~n; 4124#L10 assume 0 == ~m;#res := 1 + ~n; 4125#AckFINAL assume true; 4149#AckEXIT >#39#return; 4086#L11-2 #res := #t~ret0;havoc #t~ret0; 4087#AckFINAL assume true; 4172#AckEXIT >#41#return; 4041#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 4044#$Ultimate##0 ~m := #in~m;~n := #in~n; 4047#L10 assume 0 == ~m;#res := 1 + ~n; 4048#AckFINAL assume true; 4067#AckEXIT >#43#return; 4068#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4073#AckFINAL assume true; 4083#AckEXIT >#39#return; 4107#L11-2 #res := #t~ret0;havoc #t~ret0; 4105#AckFINAL assume true; 4101#AckEXIT >#41#return; 4077#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 4064#$Ultimate##0 ~m := #in~m;~n := #in~n; 4097#L10 assume 0 == ~m;#res := 1 + ~n; 4118#AckFINAL assume true; 4152#AckEXIT >#43#return; 4148#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4144#AckFINAL assume true; 4145#AckEXIT >#41#return; 4153#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 4156#$Ultimate##0 ~m := #in~m;~n := #in~n; 4171#L10 assume 0 == ~m;#res := 1 + ~n; 4118#AckFINAL assume true; 4152#AckEXIT >#43#return; 4148#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4144#AckFINAL assume true; 4145#AckEXIT >#41#return; 4154#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 4156#$Ultimate##0 ~m := #in~m;~n := #in~n; 4171#L10 assume 0 == ~m;#res := 1 + ~n; 4118#AckFINAL assume true; 4152#AckEXIT >#43#return; 4151#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4175#AckFINAL assume true; 4173#AckEXIT >#41#return; 4058#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 4057#$Ultimate##0 ~m := #in~m;~n := #in~n; 4059#L10 assume 0 == ~m;#res := 1 + ~n; 4092#AckFINAL assume true; 4177#AckEXIT >#43#return; 4068#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4073#AckFINAL assume true; 4083#AckEXIT >#39#return; 4108#L11-2 #res := #t~ret0;havoc #t~ret0; 4106#AckFINAL assume true; 4104#AckEXIT >#41#return; 4063#L12-1 [2023-11-19 07:55:57,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1001831615, now seen corresponding path program 1 times [2023-11-19 07:55:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:57,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449991727] [2023-11-19 07:55:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:57,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:57,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:57,936 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash -813826963, now seen corresponding path program 1 times [2023-11-19 07:55:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576975872] [2023-11-19 07:55:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:57,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:55:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:55:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:59,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:55:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:59,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-19 07:55:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:59,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-19 07:55:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:59,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-19 07:55:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 170 proven. 99 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-11-19 07:55:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:59,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576975872] [2023-11-19 07:55:59,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576975872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:59,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458504430] [2023-11-19 07:55:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:59,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:59,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:59,048 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:59,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2023-11-19 07:55:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:59,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:55:59,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 169 proven. 75 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-19 07:55:59,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 167 proven. 99 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-11-19 07:56:00,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458504430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:00,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:00,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 19 [2023-11-19 07:56:00,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076992203] [2023-11-19 07:56:00,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:00,718 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:56:00,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:00,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:56:00,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:56:00,719 INFO L87 Difference]: Start difference. First operand 137 states and 190 transitions. cyclomatic complexity: 56 Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 15 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (28), 10 states have call predecessors, (28), 15 states have call successors, (28) [2023-11-19 07:56:01,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:01,370 INFO L93 Difference]: Finished difference Result 215 states and 424 transitions. [2023-11-19 07:56:01,370 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 215 states and 424 transitions. [2023-11-19 07:56:01,376 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 38 [2023-11-19 07:56:01,381 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 215 states to 175 states and 330 transitions. [2023-11-19 07:56:01,381 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 146 [2023-11-19 07:56:01,382 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 146 [2023-11-19 07:56:01,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 330 transitions. [2023-11-19 07:56:01,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:56:01,389 INFO L218 hiAutomatonCegarLoop]: Abstraction has 175 states and 330 transitions. [2023-11-19 07:56:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states and 330 transitions. [2023-11-19 07:56:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 116. [2023-11-19 07:56:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 76 states have (on average 1.131578947368421) internal successors, (86), 81 states have internal predecessors, (86), 25 states have call successors, (25), 14 states have call predecessors, (25), 15 states have return successors, (42), 20 states have call predecessors, (42), 22 states have call successors, (42) [2023-11-19 07:56:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 153 transitions. [2023-11-19 07:56:01,404 INFO L240 hiAutomatonCegarLoop]: Abstraction has 116 states and 153 transitions. [2023-11-19 07:56:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:56:01,406 INFO L428 stractBuchiCegarLoop]: Abstraction has 116 states and 153 transitions. [2023-11-19 07:56:01,406 INFO L335 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2023-11-19 07:56:01,406 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 116 states and 153 transitions. [2023-11-19 07:56:01,407 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 29 [2023-11-19 07:56:01,408 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:56:01,408 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:56:01,416 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:01,416 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [17, 16, 12, 7, 7, 7, 7, 5, 5, 5, 5, 5, 4, 4] [2023-11-19 07:56:01,417 INFO L748 eck$LassoCheckResult]: Stem: 5453#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 5431#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 5432#L19 assume !!(main_~x~0#1 <= 28); 5458#L20 assume !!(main_~y~0#1 <= 3); 5451#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 5448#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 5459#$Ultimate##0 ~m := #in~m;~n := #in~n; 5482#L10 assume !(0 == ~m); 5484#L11 assume !(0 == ~n); 5443#L12 call #t~ret1 := Ack(~m, ~n - 1);< 5481#$Ultimate##0 ~m := #in~m;~n := #in~n; 5483#L10 assume !(0 == ~m); 5498#L11 assume 0 == ~n; 5475#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 5478#$Ultimate##0 ~m := #in~m;~n := #in~n; 5473#L10 assume !(0 == ~m); 5476#L11 assume !(0 == ~n); 5463#L12 call #t~ret1 := Ack(~m, ~n - 1);< 5506#$Ultimate##0 ~m := #in~m;~n := #in~n; 5467#L10 assume !(0 == ~m); 5462#L11 assume 0 == ~n; 5464#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 5457#$Ultimate##0 ~m := #in~m;~n := #in~n; 5477#L10 assume 0 == ~m;#res := 1 + ~n; 5497#AckFINAL assume true; 5489#AckEXIT >#39#return; 5490#L11-2 #res := #t~ret0;havoc #t~ret0; 5525#AckFINAL assume true; 5505#AckEXIT >#41#return; 5502#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 5503#$Ultimate##0 ~m := #in~m;~n := #in~n; 5520#L10 assume 0 == ~m;#res := 1 + ~n; 5516#AckFINAL assume true; 5501#AckEXIT >#43#return; 5500#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5499#AckFINAL assume true; 5491#AckEXIT >#39#return; 5493#L11-2 #res := #t~ret0;havoc #t~ret0; 5533#AckFINAL assume true; 5442#AckEXIT >#41#return; 5421#L12-1 [2023-11-19 07:56:01,420 INFO L750 eck$LassoCheckResult]: Loop: 5421#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 5440#$Ultimate##0 ~m := #in~m;~n := #in~n; 5465#L10 assume !(0 == ~m); 5466#L11 assume !(0 == ~n); 5420#L12 call #t~ret1 := Ack(~m, ~n - 1);< 5440#$Ultimate##0 ~m := #in~m;~n := #in~n; 5465#L10 assume !(0 == ~m); 5466#L11 assume 0 == ~n; 5486#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 5455#$Ultimate##0 ~m := #in~m;~n := #in~n; 5485#L10 assume !(0 == ~m); 5488#L11 assume !(0 == ~n); 5428#L12 call #t~ret1 := Ack(~m, ~n - 1);< 5437#$Ultimate##0 ~m := #in~m;~n := #in~n; 5427#L10 assume !(0 == ~m); 5429#L11 assume 0 == ~n; 5433#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 5455#$Ultimate##0 ~m := #in~m;~n := #in~n; 5485#L10 assume !(0 == ~m); 5488#L11 assume !(0 == ~n); 5428#L12 call #t~ret1 := Ack(~m, ~n - 1);< 5437#$Ultimate##0 ~m := #in~m;~n := #in~n; 5427#L10 assume !(0 == ~m); 5429#L11 assume 0 == ~n; 5433#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 5455#$Ultimate##0 ~m := #in~m;~n := #in~n; 5485#L10 assume 0 == ~m;#res := 1 + ~n; 5487#AckFINAL assume true; 5494#AckEXIT >#39#return; 5495#L11-2 #res := #t~ret0;havoc #t~ret0; 5524#AckFINAL assume true; 5522#AckEXIT >#41#return; 5518#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 5519#$Ultimate##0 ~m := #in~m;~n := #in~n; 5523#L10 assume 0 == ~m;#res := 1 + ~n; 5521#AckFINAL assume true; 5517#AckEXIT >#43#return; 5515#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5514#AckFINAL assume true; 5513#AckEXIT >#39#return; 5492#L11-2 #res := #t~ret0;havoc #t~ret0; 5511#AckFINAL assume true; 5509#AckEXIT >#41#return; 5439#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 5469#$Ultimate##0 ~m := #in~m;~n := #in~n; 5470#L10 assume !(0 == ~m); 5461#L11 assume 0 == ~n; 5433#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 5455#$Ultimate##0 ~m := #in~m;~n := #in~n; 5485#L10 assume !(0 == ~m); 5488#L11 assume !(0 == ~n); 5428#L12 call #t~ret1 := Ack(~m, ~n - 1);< 5437#$Ultimate##0 ~m := #in~m;~n := #in~n; 5427#L10 assume !(0 == ~m); 5429#L11 assume 0 == ~n; 5433#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 5455#$Ultimate##0 ~m := #in~m;~n := #in~n; 5485#L10 assume !(0 == ~m); 5488#L11 assume !(0 == ~n); 5428#L12 call #t~ret1 := Ack(~m, ~n - 1);< 5437#$Ultimate##0 ~m := #in~m;~n := #in~n; 5427#L10 assume !(0 == ~m); 5429#L11 assume 0 == ~n; 5433#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 5455#$Ultimate##0 ~m := #in~m;~n := #in~n; 5485#L10 assume 0 == ~m;#res := 1 + ~n; 5487#AckFINAL assume true; 5494#AckEXIT >#39#return; 5495#L11-2 #res := #t~ret0;havoc #t~ret0; 5524#AckFINAL assume true; 5522#AckEXIT >#41#return; 5518#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 5519#$Ultimate##0 ~m := #in~m;~n := #in~n; 5523#L10 assume 0 == ~m;#res := 1 + ~n; 5521#AckFINAL assume true; 5517#AckEXIT >#43#return; 5515#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5514#AckFINAL assume true; 5513#AckEXIT >#39#return; 5492#L11-2 #res := #t~ret0;havoc #t~ret0; 5511#AckFINAL assume true; 5509#AckEXIT >#41#return; 5439#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 5469#$Ultimate##0 ~m := #in~m;~n := #in~n; 5470#L10 assume !(0 == ~m); 5461#L11 assume 0 == ~n; 5433#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 5455#$Ultimate##0 ~m := #in~m;~n := #in~n; 5485#L10 assume 0 == ~m;#res := 1 + ~n; 5487#AckFINAL assume true; 5494#AckEXIT >#39#return; 5495#L11-2 #res := #t~ret0;havoc #t~ret0; 5524#AckFINAL assume true; 5522#AckEXIT >#43#return; 5507#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5504#AckFINAL assume true; 5496#AckEXIT >#39#return; 5492#L11-2 #res := #t~ret0;havoc #t~ret0; 5511#AckFINAL assume true; 5509#AckEXIT >#43#return; 5507#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5504#AckFINAL assume true; 5496#AckEXIT >#39#return; 5493#L11-2 #res := #t~ret0;havoc #t~ret0; 5533#AckFINAL assume true; 5442#AckEXIT >#41#return; 5421#L12-1 [2023-11-19 07:56:01,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2116653570, now seen corresponding path program 2 times [2023-11-19 07:56:01,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:01,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868391430] [2023-11-19 07:56:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:01,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:01,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:01,441 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:01,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:01,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1818744058, now seen corresponding path program 2 times [2023-11-19 07:56:01,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:01,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053647845] [2023-11-19 07:56:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:01,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:56:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:56:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:56:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 189 proven. 191 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-11-19 07:56:02,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:02,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053647845] [2023-11-19 07:56:02,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053647845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:02,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45187570] [2023-11-19 07:56:02,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:56:02,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:02,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:02,559 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:02,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2023-11-19 07:56:02,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:56:02,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:02,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:56:02,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 119 proven. 148 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-11-19 07:56:02,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 135 proven. 137 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-11-19 07:56:04,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45187570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:04,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:04,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 33 [2023-11-19 07:56:04,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096718087] [2023-11-19 07:56:04,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:04,681 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:56:04,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:04,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 07:56:04,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 07:56:04,683 INFO L87 Difference]: Start difference. First operand 116 states and 153 transitions. cyclomatic complexity: 40 Second operand has 33 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 22 states have internal predecessors, (57), 11 states have call successors, (14), 1 states have call predecessors, (14), 16 states have return successors, (31), 19 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-19 07:56:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:05,831 INFO L93 Difference]: Finished difference Result 172 states and 266 transitions. [2023-11-19 07:56:05,831 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 172 states and 266 transitions. [2023-11-19 07:56:05,834 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 50 [2023-11-19 07:56:05,838 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 172 states to 171 states and 260 transitions. [2023-11-19 07:56:05,838 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 133 [2023-11-19 07:56:05,838 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 133 [2023-11-19 07:56:05,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 171 states and 260 transitions. [2023-11-19 07:56:05,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:56:05,839 INFO L218 hiAutomatonCegarLoop]: Abstraction has 171 states and 260 transitions. [2023-11-19 07:56:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states and 260 transitions. [2023-11-19 07:56:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 150. [2023-11-19 07:56:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 103 states have internal predecessors, (107), 33 states have call successors, (33), 18 states have call predecessors, (33), 21 states have return successors, (70), 28 states have call predecessors, (70), 28 states have call successors, (70) [2023-11-19 07:56:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 210 transitions. [2023-11-19 07:56:05,851 INFO L240 hiAutomatonCegarLoop]: Abstraction has 150 states and 210 transitions. [2023-11-19 07:56:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-19 07:56:05,852 INFO L428 stractBuchiCegarLoop]: Abstraction has 150 states and 210 transitions. [2023-11-19 07:56:05,853 INFO L335 stractBuchiCegarLoop]: ======== Iteration 10 ============ [2023-11-19 07:56:05,853 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 150 states and 210 transitions. [2023-11-19 07:56:05,854 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 36 [2023-11-19 07:56:05,855 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:56:05,855 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:56:05,855 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:05,856 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:56:05,856 INFO L748 eck$LassoCheckResult]: Stem: 6916#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 6891#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 6892#L19 assume !!(main_~x~0#1 <= 28); 6926#L20 assume !!(main_~y~0#1 <= 3); 6914#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 6915#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 6927#$Ultimate##0 ~m := #in~m;~n := #in~n; 6949#L10 assume !(0 == ~m); 6951#L11 assume !(0 == ~n); 6945#L12 call #t~ret1 := Ack(~m, ~n - 1);< 6948#$Ultimate##0 ~m := #in~m;~n := #in~n; 6950#L10 assume !(0 == ~m); 6944#L11 assume 0 == ~n; 6939#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 6943#$Ultimate##0 ~m := #in~m;~n := #in~n; 6940#L10 assume !(0 == ~m); 6941#L11 assume !(0 == ~n); 6924#L12 call #t~ret1 := Ack(~m, ~n - 1);< 6937#$Ultimate##0 ~m := #in~m;~n := #in~n; 6934#L10 assume !(0 == ~m); 6935#L11 assume 0 == ~n; 6923#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 6925#$Ultimate##0 ~m := #in~m;~n := #in~n; 6942#L10 assume 0 == ~m;#res := 1 + ~n; 7007#AckFINAL assume true; 7002#AckEXIT >#39#return; 7000#L11-2 #res := #t~ret0;havoc #t~ret0; 6992#AckFINAL assume true; 6990#AckEXIT >#41#return; 6988#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 6989#$Ultimate##0 ~m := #in~m;~n := #in~n; 6995#L10 assume 0 == ~m;#res := 1 + ~n; 6993#AckFINAL assume true; 6987#AckEXIT >#43#return; 6986#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 6985#AckFINAL assume true; 6978#AckEXIT >#39#return; 6974#L11-2 #res := #t~ret0;havoc #t~ret0; 6975#AckFINAL assume true; 6965#AckEXIT >#41#return; 6920#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 6960#$Ultimate##0 [2023-11-19 07:56:05,856 INFO L750 eck$LassoCheckResult]: Loop: 6960#$Ultimate##0 ~m := #in~m;~n := #in~n; 6959#L10 assume !(0 == ~m); 6958#L11 assume !(0 == ~n); 6921#L12 call #t~ret1 := Ack(~m, ~n - 1);< 6960#$Ultimate##0 [2023-11-19 07:56:05,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:05,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1191751188, now seen corresponding path program 3 times [2023-11-19 07:56:05,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:05,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455258334] [2023-11-19 07:56:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:05,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:05,878 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:05,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:05,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash 927715, now seen corresponding path program 5 times [2023-11-19 07:56:05,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:05,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777829584] [2023-11-19 07:56:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:05,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:05,901 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:05,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:05,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash -404452274, now seen corresponding path program 4 times [2023-11-19 07:56:05,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:05,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795603615] [2023-11-19 07:56:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:05,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:05,940 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:05,961 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:06,013 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:56:06,014 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:56:06,014 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:56:06,014 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:56:06,014 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:56:06,014 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,014 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:56:06,015 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:56:06,015 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration10_Loop [2023-11-19 07:56:06,015 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:56:06,015 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:56:06,016 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:06,019 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:06,021 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:06,023 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:06,026 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:06,028 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:06,033 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:06,039 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:06,103 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:56:06,103 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:56:06,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:06,107 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:06,113 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:06,113 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:06,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (120)] Waiting until timeout for monitored process [2023-11-19 07:56:06,144 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:06,144 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:56:06,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (120)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:06,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:06,165 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:06,168 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:06,168 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:06,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (121)] Waiting until timeout for monitored process [2023-11-19 07:56:06,200 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:06,200 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:56:06,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (121)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:06,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:06,220 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:06,223 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:06,223 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:06,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (122)] Waiting until timeout for monitored process [2023-11-19 07:56:06,260 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:06,260 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=0} Honda state: {Ack_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:56:06,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (122)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:06,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:06,281 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:06,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (123)] Waiting until timeout for monitored process [2023-11-19 07:56:06,283 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:06,283 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:06,295 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:06,295 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:56:06,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (123)] Ended with exit code 0 [2023-11-19 07:56:06,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:06,308 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:06,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (124)] Waiting until timeout for monitored process [2023-11-19 07:56:06,310 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:06,310 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:06,322 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:06,322 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:56:06,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (124)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:06,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:06,338 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:06,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (125)] Waiting until timeout for monitored process [2023-11-19 07:56:06,340 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:06,340 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:06,360 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:06,360 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~m=4} Honda state: {Ack_#in~m=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:56:06,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (125)] Ended with exit code 0 [2023-11-19 07:56:06,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:06,379 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:06,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (126)] Waiting until timeout for monitored process [2023-11-19 07:56:06,381 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:06,381 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:06,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (126)] Ended with exit code 0 [2023-11-19 07:56:06,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:06,409 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:06,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (127)] Waiting until timeout for monitored process [2023-11-19 07:56:06,412 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:56:06,412 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:06,468 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:06,468 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~n=-5} Honda state: {Ack_#in~n=-5} Generalized eigenvectors: [{Ack_#in~n=-1}, {Ack_#in~n=0}, {Ack_#in~n=0}] Lambdas: [1, 3, 9] Nus: [1, 0] [2023-11-19 07:56:06,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (127)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:06,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:06,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:06,487 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:06,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (128)] Waiting until timeout for monitored process [2023-11-19 07:56:06,493 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:06,493 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:06,506 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:06,506 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~n=0} Honda state: {Ack_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:56:06,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (128)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:07,145 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:56:07,145 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:56:07,145 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:56:07,145 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:56:07,145 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:56:07,145 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,145 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:56:07,145 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:56:07,145 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration10_Lasso [2023-11-19 07:56:07,145 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:56:07,146 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:56:07,146 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,148 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,150 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,156 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,158 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,161 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,163 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,165 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,166 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,168 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,170 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,175 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,177 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,179 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,257 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:56:07,257 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:56:07,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,264 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (129)] Waiting until timeout for monitored process [2023-11-19 07:56:07,266 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:07,266 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:07,278 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:07,278 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res#1=0} Honda state: {ULTIMATE.start_main_#res#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:56:07,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (129)] Ended with exit code 0 [2023-11-19 07:56:07,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,294 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (130)] Waiting until timeout for monitored process [2023-11-19 07:56:07,295 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:07,295 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:07,306 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:56:07,306 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:56:07,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (130)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:07,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,321 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (131)] Waiting until timeout for monitored process [2023-11-19 07:56:07,323 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:56:07,323 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:07,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (131)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:07,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,347 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (132)] Waiting until timeout for monitored process [2023-11-19 07:56:07,348 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:56:07,348 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:56:07,412 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:56:07,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (132)] Ended with exit code 0 [2023-11-19 07:56:07,415 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:56:07,415 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:56:07,415 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:56:07,415 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:56:07,415 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:56:07,415 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,415 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:56:07,415 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:56:07,415 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann-2.c_Iteration10_Lasso [2023-11-19 07:56:07,416 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:56:07,416 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:56:07,416 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,418 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,420 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,422 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,424 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,432 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,434 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,436 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,440 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,442 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,444 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,446 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,451 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,453 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:56:07,531 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:56:07,531 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:56:07,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,532 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (133)] Waiting until timeout for monitored process [2023-11-19 07:56:07,534 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:56:07,543 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:56:07,543 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:56:07,544 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:56:07,544 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:56:07,544 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:56:07,544 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:56:07,544 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:56:07,545 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:56:07,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (133)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:07,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,558 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (134)] Waiting until timeout for monitored process [2023-11-19 07:56:07,560 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:56:07,570 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:56:07,570 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:56:07,570 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:56:07,570 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:56:07,570 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:56:07,570 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:56:07,570 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:56:07,572 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:56:07,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (134)] Ended with exit code 0 [2023-11-19 07:56:07,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,585 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (135)] Waiting until timeout for monitored process [2023-11-19 07:56:07,587 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:56:07,596 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:56:07,596 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:56:07,597 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:56:07,597 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:56:07,597 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:56:07,597 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:56:07,597 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:56:07,608 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:56:07,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (135)] Ended with exit code 0 [2023-11-19 07:56:07,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,622 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (136)] Waiting until timeout for monitored process [2023-11-19 07:56:07,623 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:56:07,633 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:56:07,633 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:56:07,633 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:56:07,633 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:56:07,633 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:56:07,633 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:56:07,633 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:56:07,635 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:56:07,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (136)] Ended with exit code 0 [2023-11-19 07:56:07,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,647 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (137)] Waiting until timeout for monitored process [2023-11-19 07:56:07,649 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:56:07,658 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:56:07,658 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:56:07,659 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-11-19 07:56:07,659 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:56:07,663 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2023-11-19 07:56:07,663 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2023-11-19 07:56:07,688 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:56:07,717 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2023-11-19 07:56:07,717 INFO L444 ModelExtractionUtils]: 1 out of 11 variables were initially zero. Simplification set additionally 7 variables to zero. [2023-11-19 07:56:07,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:56:07,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,723 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,725 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:56:07,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (138)] Waiting until timeout for monitored process [2023-11-19 07:56:07,740 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2023-11-19 07:56:07,740 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:56:07,740 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(Ack_#in~n) = 1*Ack_#in~n Supporting invariants [1*Ack_#in~n >= 0] [2023-11-19 07:56:07,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (137)] Ended with exit code 0 [2023-11-19 07:56:07,758 INFO L156 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2023-11-19 07:56:07,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:07,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:56:07,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:08,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (138)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:08,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:56:08,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:08,521 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.11 stem predicates 3 loop predicates [2023-11-19 07:56:08,521 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 150 states and 210 transitions. cyclomatic complexity: 64 Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:56:08,868 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 150 states and 210 transitions. cyclomatic complexity: 64. Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Result 156 states and 220 transitions. Complement of second has 13 states. [2023-11-19 07:56:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 7 stem states 1 non-accepting loop states 1 accepting loop states [2023-11-19 07:56:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:56:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 22 transitions. [2023-11-19 07:56:08,869 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 22 transitions. Stem has 41 letters. Loop has 4 letters. [2023-11-19 07:56:08,870 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:56:08,870 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:56:08,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:08,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:56:08,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:09,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:56:09,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:09,622 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.11 stem predicates 3 loop predicates [2023-11-19 07:56:09,623 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 150 states and 210 transitions. cyclomatic complexity: 64 Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:56:10,048 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 150 states and 210 transitions. cyclomatic complexity: 64. Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Result 156 states and 220 transitions. Complement of second has 13 states. [2023-11-19 07:56:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 7 stem states 1 non-accepting loop states 1 accepting loop states [2023-11-19 07:56:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:56:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 22 transitions. [2023-11-19 07:56:10,050 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 22 transitions. Stem has 41 letters. Loop has 4 letters. [2023-11-19 07:56:10,050 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:56:10,050 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:56:10,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:10,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:56:10,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:10,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:56:10,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:10,810 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.11 stem predicates 3 loop predicates [2023-11-19 07:56:10,811 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 150 states and 210 transitions. cyclomatic complexity: 64 Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:56:11,572 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 150 states and 210 transitions. cyclomatic complexity: 64. Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Result 245 states and 322 transitions. Complement of second has 42 states. [2023-11-19 07:56:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 12 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-19 07:56:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:56:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 38 transitions. [2023-11-19 07:56:11,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 38 transitions. Stem has 41 letters. Loop has 4 letters. [2023-11-19 07:56:11,578 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:56:11,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 38 transitions. Stem has 45 letters. Loop has 4 letters. [2023-11-19 07:56:11,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:56:11,579 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 38 transitions. Stem has 41 letters. Loop has 8 letters. [2023-11-19 07:56:11,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:56:11,579 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 245 states and 322 transitions. [2023-11-19 07:56:11,584 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 45 [2023-11-19 07:56:11,587 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 245 states to 196 states and 254 transitions. [2023-11-19 07:56:11,588 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 136 [2023-11-19 07:56:11,588 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 144 [2023-11-19 07:56:11,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 196 states and 254 transitions. [2023-11-19 07:56:11,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:56:11,589 INFO L218 hiAutomatonCegarLoop]: Abstraction has 196 states and 254 transitions. [2023-11-19 07:56:11,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states and 254 transitions. [2023-11-19 07:56:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 171. [2023-11-19 07:56:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 111 states have (on average 1.1081081081081081) internal successors, (123), 116 states have internal predecessors, (123), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (49), 34 states have call predecessors, (49), 35 states have call successors, (49) [2023-11-19 07:56:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2023-11-19 07:56:11,598 INFO L240 hiAutomatonCegarLoop]: Abstraction has 171 states and 212 transitions. [2023-11-19 07:56:11,598 INFO L428 stractBuchiCegarLoop]: Abstraction has 171 states and 212 transitions. [2023-11-19 07:56:11,598 INFO L335 stractBuchiCegarLoop]: ======== Iteration 11 ============ [2023-11-19 07:56:11,599 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 171 states and 212 transitions. [2023-11-19 07:56:11,600 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 42 [2023-11-19 07:56:11,601 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:56:11,601 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:56:11,602 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [14, 11, 10, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:11,603 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [14, 11, 10, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3] [2023-11-19 07:56:11,603 INFO L748 eck$LassoCheckResult]: Stem: 8218#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 8182#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 8183#L19 assume !!(main_~x~0#1 <= 28); 8232#L20 assume !!(main_~y~0#1 <= 3); 8216#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 8217#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 8233#$Ultimate##0 ~m := #in~m;~n := #in~n; 8250#L10 assume !(0 == ~m); 8251#L11 assume 0 == ~n; 8243#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8247#$Ultimate##0 ~m := #in~m;~n := #in~n; 8242#L10 assume !(0 == ~m); 8246#L11 assume !(0 == ~n); 8208#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8273#$Ultimate##0 ~m := #in~m;~n := #in~n; 8236#L10 assume !(0 == ~m); 8238#L11 assume !(0 == ~n); 8225#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8239#$Ultimate##0 ~m := #in~m;~n := #in~n; 8240#L10 assume !(0 == ~m); 8235#L11 assume 0 == ~n; 8224#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8227#$Ultimate##0 ~m := #in~m;~n := #in~n; 8242#L10 assume !(0 == ~m); 8246#L11 assume !(0 == ~n); 8208#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8273#$Ultimate##0 ~m := #in~m;~n := #in~n; 8236#L10 assume !(0 == ~m); 8237#L11 assume 0 == ~n; 8244#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8227#$Ultimate##0 ~m := #in~m;~n := #in~n; 8242#L10 assume !(0 == ~m); 8246#L11 assume !(0 == ~n); 8208#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8273#$Ultimate##0 ~m := #in~m;~n := #in~n; 8236#L10 assume !(0 == ~m); 8237#L11 assume 0 == ~n; 8244#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8227#$Ultimate##0 ~m := #in~m;~n := #in~n; 8248#L10 assume 0 == ~m;#res := 1 + ~n; 8314#AckFINAL assume true; 8313#AckEXIT >#39#return; 8312#L11-2 #res := #t~ret0;havoc #t~ret0; 8311#AckFINAL assume true; 8310#AckEXIT >#41#return; 8288#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 8289#$Ultimate##0 ~m := #in~m;~n := #in~n; 8296#L10 assume 0 == ~m;#res := 1 + ~n; 8294#AckFINAL assume true; 8287#AckEXIT >#43#return; 8284#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8282#AckFINAL assume true; 8279#AckEXIT >#39#return; 8276#L11-2 #res := #t~ret0;havoc #t~ret0; 8275#AckFINAL assume true; 8268#AckEXIT >#41#return; 8180#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 8267#$Ultimate##0 ~m := #in~m;~n := #in~n; 8265#L10 assume !(0 == ~m); 8266#L11 assume !(0 == ~n); 8220#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8262#$Ultimate##0 ~m := #in~m;~n := #in~n; 8261#L10 assume !(0 == ~m); 8260#L11 assume 0 == ~n; 8219#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8223#$Ultimate##0 ~m := #in~m;~n := #in~n; 8304#L10 assume 0 == ~m;#res := 1 + ~n; 8303#AckFINAL assume true; 8299#AckEXIT >#39#return; 8300#L11-2 #res := #t~ret0;havoc #t~ret0; 8333#AckFINAL assume true; 8330#AckEXIT >#41#return; 8179#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 8181#$Ultimate##0 ~m := #in~m;~n := #in~n; 8184#L10 assume 0 == ~m;#res := 1 + ~n; 8187#AckFINAL assume true; 8326#AckEXIT >#43#return; 8327#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8341#AckFINAL assume true; 8339#AckEXIT >#43#return; 8337#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8336#AckFINAL assume true; 8334#AckEXIT >#39#return; 8234#L11-2 #res := #t~ret0;havoc #t~ret0; 8228#AckFINAL assume true; 8231#AckEXIT >#41#return; 8214#L12-1 [2023-11-19 07:56:11,603 INFO L750 eck$LassoCheckResult]: Loop: 8214#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 8324#$Ultimate##0 ~m := #in~m;~n := #in~n; 8316#L10 assume !(0 == ~m); 8257#L11 assume 0 == ~n; 8194#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8259#$Ultimate##0 ~m := #in~m;~n := #in~n; 8258#L10 assume !(0 == ~m); 8192#L11 assume !(0 == ~n); 8197#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8274#$Ultimate##0 ~m := #in~m;~n := #in~n; 8285#L10 assume !(0 == ~m); 8286#L11 assume !(0 == ~n); 8205#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8206#$Ultimate##0 ~m := #in~m;~n := #in~n; 8307#L10 assume !(0 == ~m); 8306#L11 assume 0 == ~n; 8196#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8280#$Ultimate##0 ~m := #in~m;~n := #in~n; 8305#L10 assume !(0 == ~m); 8192#L11 assume !(0 == ~n); 8197#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8274#$Ultimate##0 ~m := #in~m;~n := #in~n; 8285#L10 assume !(0 == ~m); 8283#L11 assume 0 == ~n; 8193#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8280#$Ultimate##0 ~m := #in~m;~n := #in~n; 8305#L10 assume !(0 == ~m); 8192#L11 assume !(0 == ~n); 8197#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8274#$Ultimate##0 ~m := #in~m;~n := #in~n; 8285#L10 assume !(0 == ~m); 8283#L11 assume 0 == ~n; 8193#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8280#$Ultimate##0 ~m := #in~m;~n := #in~n; 8305#L10 assume 0 == ~m;#res := 1 + ~n; 8303#AckFINAL assume true; 8299#AckEXIT >#39#return; 8298#L11-2 #res := #t~ret0;havoc #t~ret0; 8297#AckFINAL assume true; 8295#AckEXIT >#41#return; 8292#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 8293#$Ultimate##0 ~m := #in~m;~n := #in~n; 8302#L10 assume 0 == ~m;#res := 1 + ~n; 8301#AckFINAL assume true; 8291#AckEXIT >#43#return; 8290#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8281#AckFINAL assume true; 8277#AckEXIT >#39#return; 8276#L11-2 #res := #t~ret0;havoc #t~ret0; 8275#AckFINAL assume true; 8268#AckEXIT >#41#return; 8180#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 8267#$Ultimate##0 ~m := #in~m;~n := #in~n; 8265#L10 assume !(0 == ~m); 8266#L11 assume !(0 == ~n); 8220#L12 call #t~ret1 := Ack(~m, ~n - 1);< 8262#$Ultimate##0 ~m := #in~m;~n := #in~n; 8261#L10 assume !(0 == ~m); 8260#L11 assume 0 == ~n; 8219#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 8223#$Ultimate##0 ~m := #in~m;~n := #in~n; 8304#L10 assume 0 == ~m;#res := 1 + ~n; 8303#AckFINAL assume true; 8299#AckEXIT >#39#return; 8300#L11-2 #res := #t~ret0;havoc #t~ret0; 8333#AckFINAL assume true; 8330#AckEXIT >#41#return; 8179#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 8181#$Ultimate##0 ~m := #in~m;~n := #in~n; 8184#L10 assume 0 == ~m;#res := 1 + ~n; 8187#AckFINAL assume true; 8326#AckEXIT >#43#return; 8327#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8341#AckFINAL assume true; 8339#AckEXIT >#43#return; 8337#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8336#AckFINAL assume true; 8334#AckEXIT >#39#return; 8234#L11-2 #res := #t~ret0;havoc #t~ret0; 8228#AckFINAL assume true; 8231#AckEXIT >#41#return; 8214#L12-1 [2023-11-19 07:56:11,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash 140394751, now seen corresponding path program 5 times [2023-11-19 07:56:11,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:11,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248892390] [2023-11-19 07:56:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:11,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:56:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:56:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 36 proven. 83 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-11-19 07:56:11,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248892390] [2023-11-19 07:56:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248892390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:11,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800204433] [2023-11-19 07:56:11,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:56:11,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:11,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:11,836 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:11,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2023-11-19 07:56:11,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-19 07:56:11,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:11,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:56:11,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 36 proven. 83 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-11-19 07:56:11,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 36 proven. 83 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-11-19 07:56:12,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800204433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:12,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:12,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-11-19 07:56:12,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467870214] [2023-11-19 07:56:12,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:12,214 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:56:12,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash 205547924, now seen corresponding path program 3 times [2023-11-19 07:56:12,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:12,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410314078] [2023-11-19 07:56:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-19 07:56:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:56:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 36 proven. 83 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-19 07:56:12,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:12,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410314078] [2023-11-19 07:56:12,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410314078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:12,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525241535] [2023-11-19 07:56:12,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:56:12,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:12,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:12,402 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:12,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2023-11-19 07:56:12,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-19 07:56:12,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:12,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:56:12,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 112 proven. 69 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-11-19 07:56:12,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 130 proven. 59 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-11-19 07:56:14,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525241535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:14,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:14,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 16] total 26 [2023-11-19 07:56:14,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72402177] [2023-11-19 07:56:14,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:14,314 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:56:14,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:14,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 07:56:14,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:56:14,316 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. cyclomatic complexity: 45 Second operand has 26 states, 23 states have (on average 2.217391304347826) internal successors, (51), 18 states have internal predecessors, (51), 11 states have call successors, (14), 3 states have call predecessors, (14), 11 states have return successors, (22), 13 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-19 07:56:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:14,816 INFO L93 Difference]: Finished difference Result 203 states and 259 transitions. [2023-11-19 07:56:14,816 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 203 states and 259 transitions. [2023-11-19 07:56:14,819 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 43 [2023-11-19 07:56:14,822 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 203 states to 187 states and 235 transitions. [2023-11-19 07:56:14,822 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 135 [2023-11-19 07:56:14,823 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2023-11-19 07:56:14,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 187 states and 235 transitions. [2023-11-19 07:56:14,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:56:14,823 INFO L218 hiAutomatonCegarLoop]: Abstraction has 187 states and 235 transitions. [2023-11-19 07:56:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states and 235 transitions. [2023-11-19 07:56:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 168. [2023-11-19 07:56:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.1090909090909091) internal successors, (122), 116 states have internal predecessors, (122), 36 states have call successors, (36), 20 states have call predecessors, (36), 22 states have return successors, (47), 31 states have call predecessors, (47), 28 states have call successors, (47) [2023-11-19 07:56:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 205 transitions. [2023-11-19 07:56:14,831 INFO L240 hiAutomatonCegarLoop]: Abstraction has 168 states and 205 transitions. [2023-11-19 07:56:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:56:14,833 INFO L428 stractBuchiCegarLoop]: Abstraction has 168 states and 205 transitions. [2023-11-19 07:56:14,833 INFO L335 stractBuchiCegarLoop]: ======== Iteration 12 ============ [2023-11-19 07:56:14,833 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 168 states and 205 transitions. [2023-11-19 07:56:14,835 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 39 [2023-11-19 07:56:14,835 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:56:14,835 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:56:14,836 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [14, 13, 9, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:14,837 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [14, 13, 9, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4] [2023-11-19 07:56:14,837 INFO L748 eck$LassoCheckResult]: Stem: 10149#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 10116#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1, main_~y~0#1, main_~r~0#1;havoc main_#t~nondet3#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1;havoc main_#t~nondet4#1;main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 10117#L19 assume !!(main_~x~0#1 <= 28); 10150#L20 assume !!(main_~y~0#1 <= 3); 10138#L21 assume !(main_~x~0#1 < 0 || main_~y~0#1 < 0); 10139#L24 call main_#t~ret5#1 := Ack(main_~x~0#1, main_~y~0#1);< 10151#$Ultimate##0 ~m := #in~m;~n := #in~n; 10172#L10 assume !(0 == ~m); 10174#L11 assume !(0 == ~n); 10132#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10169#$Ultimate##0 ~m := #in~m;~n := #in~n; 10171#L10 assume !(0 == ~m); 10258#L11 assume 0 == ~n; 10162#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 10165#$Ultimate##0 ~m := #in~m;~n := #in~n; 10161#L10 assume !(0 == ~m); 10164#L11 assume !(0 == ~n); 10155#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10159#$Ultimate##0 ~m := #in~m;~n := #in~n; 10157#L10 assume !(0 == ~m); 10154#L11 assume 0 == ~n; 10156#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 10148#$Ultimate##0 ~m := #in~m;~n := #in~n; 10161#L10 assume !(0 == ~m); 10164#L11 assume !(0 == ~n); 10155#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10159#$Ultimate##0 ~m := #in~m;~n := #in~n; 10157#L10 assume !(0 == ~m); 10154#L11 assume 0 == ~n; 10156#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 10148#$Ultimate##0 ~m := #in~m;~n := #in~n; 10166#L10 assume 0 == ~m;#res := 1 + ~n; 10233#AckFINAL assume true; 10232#AckEXIT >#39#return; 10231#L11-2 #res := #t~ret0;havoc #t~ret0; 10230#AckFINAL assume true; 10229#AckEXIT >#41#return; 10225#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 10226#$Ultimate##0 ~m := #in~m;~n := #in~n; 10228#L10 assume 0 == ~m;#res := 1 + ~n; 10227#AckFINAL assume true; 10224#AckEXIT >#43#return; 10223#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10222#AckFINAL assume true; 10203#AckEXIT >#39#return; 10200#L11-2 #res := #t~ret0;havoc #t~ret0; 10199#AckFINAL assume true; 10198#AckEXIT >#41#return; 10104#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 10194#$Ultimate##0 ~m := #in~m;~n := #in~n; 10195#L10 assume !(0 == ~m); 10192#L11 assume !(0 == ~n); 10144#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10182#$Ultimate##0 ~m := #in~m;~n := #in~n; 10183#L10 assume !(0 == ~m); 10193#L11 assume !(0 == ~n); 10142#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10182#$Ultimate##0 ~m := #in~m;~n := #in~n; 10181#L10 assume !(0 == ~m); 10180#L11 assume 0 == ~n; 10141#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 10145#$Ultimate##0 ~m := #in~m;~n := #in~n; 10221#L10 assume 0 == ~m;#res := 1 + ~n; 10220#AckFINAL assume true; 10218#AckEXIT >#39#return; 10219#L11-2 #res := #t~ret0;havoc #t~ret0; 10255#AckFINAL assume true; 10254#AckEXIT >#41#return; 10108#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 10105#$Ultimate##0 ~m := #in~m;~n := #in~n; 10106#L10 assume 0 == ~m;#res := 1 + ~n; 10109#AckFINAL assume true; 10246#AckEXIT >#43#return; 10247#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10253#AckFINAL assume true; 10249#AckEXIT >#41#return; 10103#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 10105#$Ultimate##0 ~m := #in~m;~n := #in~n; 10106#L10 assume 0 == ~m;#res := 1 + ~n; 10109#AckFINAL assume true; 10246#AckEXIT >#43#return; 10248#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10266#AckFINAL assume true; 10262#AckEXIT >#43#return; 10260#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10259#AckFINAL assume true; 10256#AckEXIT >#39#return; 10152#L11-2 #res := #t~ret0;havoc #t~ret0; 10153#AckFINAL assume true; 10131#AckEXIT >#41#return; 10111#L12-1 [2023-11-19 07:56:14,837 INFO L750 eck$LassoCheckResult]: Loop: 10111#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 10191#$Ultimate##0 ~m := #in~m;~n := #in~n; 10110#L10 assume !(0 == ~m); 10115#L11 assume !(0 == ~n); 10135#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10188#$Ultimate##0 ~m := #in~m;~n := #in~n; 10190#L10 assume !(0 == ~m); 10206#L11 assume 0 == ~n; 10119#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 10179#$Ultimate##0 ~m := #in~m;~n := #in~n; 10176#L10 assume !(0 == ~m); 10118#L11 assume !(0 == ~n); 10123#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10127#$Ultimate##0 ~m := #in~m;~n := #in~n; 10128#L10 assume !(0 == ~m); 10205#L11 assume 0 == ~n; 10121#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 10177#$Ultimate##0 ~m := #in~m;~n := #in~n; 10178#L10 assume !(0 == ~m); 10118#L11 assume !(0 == ~n); 10123#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10127#$Ultimate##0 ~m := #in~m;~n := #in~n; 10128#L10 assume !(0 == ~m); 10205#L11 assume 0 == ~n; 10121#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 10177#$Ultimate##0 ~m := #in~m;~n := #in~n; 10178#L10 assume 0 == ~m;#res := 1 + ~n; 10220#AckFINAL assume true; 10218#AckEXIT >#39#return; 10217#L11-2 #res := #t~ret0;havoc #t~ret0; 10216#AckFINAL assume true; 10214#AckEXIT >#41#return; 10211#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 10212#$Ultimate##0 ~m := #in~m;~n := #in~n; 10215#L10 assume 0 == ~m;#res := 1 + ~n; 10213#AckFINAL assume true; 10210#AckEXIT >#43#return; 10209#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10204#AckFINAL assume true; 10201#AckEXIT >#39#return; 10200#L11-2 #res := #t~ret0;havoc #t~ret0; 10199#AckFINAL assume true; 10198#AckEXIT >#41#return; 10104#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 10194#$Ultimate##0 ~m := #in~m;~n := #in~n; 10195#L10 assume !(0 == ~m); 10192#L11 assume !(0 == ~n); 10144#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10182#$Ultimate##0 ~m := #in~m;~n := #in~n; 10183#L10 assume !(0 == ~m); 10193#L11 assume !(0 == ~n); 10142#L12 call #t~ret1 := Ack(~m, ~n - 1);< 10182#$Ultimate##0 ~m := #in~m;~n := #in~n; 10181#L10 assume !(0 == ~m); 10180#L11 assume 0 == ~n; 10141#L11-1 call #t~ret0 := Ack(~m - 1, 1);< 10145#$Ultimate##0 ~m := #in~m;~n := #in~n; 10221#L10 assume 0 == ~m;#res := 1 + ~n; 10220#AckFINAL assume true; 10218#AckEXIT >#39#return; 10219#L11-2 #res := #t~ret0;havoc #t~ret0; 10255#AckFINAL assume true; 10254#AckEXIT >#41#return; 10108#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 10105#$Ultimate##0 ~m := #in~m;~n := #in~n; 10106#L10 assume 0 == ~m;#res := 1 + ~n; 10109#AckFINAL assume true; 10246#AckEXIT >#43#return; 10247#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10253#AckFINAL assume true; 10249#AckEXIT >#41#return; 10103#L12-1 call #t~ret2 := Ack(~m - 1, #t~ret1);< 10105#$Ultimate##0 ~m := #in~m;~n := #in~n; 10106#L10 assume 0 == ~m;#res := 1 + ~n; 10109#AckFINAL assume true; 10246#AckEXIT >#43#return; 10248#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10266#AckFINAL assume true; 10262#AckEXIT >#43#return; 10260#L12-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10259#AckFINAL assume true; 10256#AckEXIT >#39#return; 10152#L11-2 #res := #t~ret0;havoc #t~ret0; 10153#AckFINAL assume true; 10131#AckEXIT >#41#return; 10111#L12-1 [2023-11-19 07:56:14,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:14,838 INFO L85 PathProgramCache]: Analyzing trace with hash -427699946, now seen corresponding path program 6 times [2023-11-19 07:56:14,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:14,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430186271] [2023-11-19 07:56:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:14,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:14,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:56:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:56:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-19 07:56:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 138 proven. 107 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-11-19 07:56:15,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430186271] [2023-11-19 07:56:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430186271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676280047] [2023-11-19 07:56:15,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:56:15,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:15,501 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:15,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2023-11-19 07:56:15,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-19 07:56:15,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:15,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:56:15,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 125 proven. 109 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-11-19 07:56:15,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 141 proven. 107 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-19 07:56:17,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676280047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:17,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:17,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2023-11-19 07:56:17,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35620928] [2023-11-19 07:56:17,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:17,567 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:56:17,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:17,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1698932523, now seen corresponding path program 4 times [2023-11-19 07:56:17,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:17,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910690742] [2023-11-19 07:56:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:17,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:17,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:56:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:17,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:17,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:17,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:17,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:17,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:18,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:56:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:18,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:18,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:56:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:18,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:56:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:18,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-19 07:56:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 142 proven. 107 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-11-19 07:56:18,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:18,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910690742] [2023-11-19 07:56:18,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910690742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:18,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048962879] [2023-11-19 07:56:18,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:56:18,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:18,186 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:18,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25666e25-e412-405e-9b20-20454c3fbd30/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2023-11-19 07:56:18,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:56:18,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:18,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:56:18,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 129 proven. 109 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-11-19 07:56:18,440 INFO L327 TraceCheckSpWp]: Computing backward predicates...