./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-bwb/xor-01-false.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b5237d83 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_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-bwb/xor-01-false.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2c513ce74590e6cb0704f3ffcd99d381485eec77314e047b28e9d8c5ce60c589 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 09:08:02,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:08:02,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:08:03,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:08:03,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:08:03,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:08:03,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:08:03,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:08:03,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:08:03,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:08:03,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:08:03,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:08:03,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:08:03,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:08:03,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:08:03,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:08:03,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:08:03,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:08:03,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:08:03,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:08:03,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:08:03,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:08:03,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:08:03,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:08:03,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:08:03,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:08:03,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:08:03,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:08:03,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:08:03,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:08:03,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:08:03,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:08:03,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:08:03,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:08:03,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:08:03,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:08:03,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:08:03,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:08:03,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:08:03,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:08:03,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:08:03,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-21 09:08:03,168 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:08:03,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:08:03,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:08:03,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:08:03,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:08:03,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:08:03,172 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:08:03,172 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-21 09:08:03,172 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-21 09:08:03,172 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-21 09:08:03,173 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-21 09:08:03,174 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-21 09:08:03,174 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-21 09:08:03,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:08:03,174 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 09:08:03,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:08:03,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:08:03,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-21 09:08:03,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-21 09:08:03,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-21 09:08:03,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 09:08:03,176 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-21 09:08:03,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:08:03,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-21 09:08:03,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:08:03,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:08:03,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:08:03,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:08:03,180 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-21 09:08:03,180 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c513ce74590e6cb0704f3ffcd99d381485eec77314e047b28e9d8c5ce60c589 [2022-11-21 09:08:03,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:08:03,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:08:03,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:08:03,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:08:03,539 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:08:03,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/termination-bwb/xor-01-false.c [2022-11-21 09:08:06,566 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:08:06,783 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:08:06,784 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/sv-benchmarks/c/termination-bwb/xor-01-false.c [2022-11-21 09:08:06,792 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/data/ca8ca870d/b94ec5bd9f144955a8e955e11f68251c/FLAG3672323d0 [2022-11-21 09:08:06,811 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/data/ca8ca870d/b94ec5bd9f144955a8e955e11f68251c [2022-11-21 09:08:06,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:08:06,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:08:06,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:08:06,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:08:06,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:08:06,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:08:06" (1/1) ... [2022-11-21 09:08:06,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb2709f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:06, skipping insertion in model container [2022-11-21 09:08:06,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:08:06" (1/1) ... [2022-11-21 09:08:06,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:08:06,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:08:06,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:08:06,990 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:08:07,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:08:07,020 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:08:07,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07 WrapperNode [2022-11-21 09:08:07,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:08:07,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:08:07,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:08:07,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:08:07,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,056 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-11-21 09:08:07,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:08:07,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:08:07,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:08:07,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:08:07,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,080 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:08:07,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:08:07,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:08:07,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:08:07,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (1/1) ... [2022-11-21 09:08:07,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:07,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:07,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:07,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-21 09:08:07,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:08:07,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:08:07,230 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:08:07,232 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:08:07,356 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:08:07,363 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:08:07,363 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 09:08:07,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:08:07 BoogieIcfgContainer [2022-11-21 09:08:07,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:08:07,367 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-21 09:08:07,367 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-21 09:08:07,371 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-21 09:08:07,372 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-21 09:08:07,372 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.11 09:08:06" (1/3) ... [2022-11-21 09:08:07,375 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@a75cf59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.11 09:08:07, skipping insertion in model container [2022-11-21 09:08:07,375 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-21 09:08:07,375 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:08:07" (2/3) ... [2022-11-21 09:08:07,376 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@a75cf59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.11 09:08:07, skipping insertion in model container [2022-11-21 09:08:07,376 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-21 09:08:07,377 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:08:07" (3/3) ... [2022-11-21 09:08:07,378 INFO L332 chiAutomizerObserver]: Analyzing ICFG xor-01-false.c [2022-11-21 09:08:07,457 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-21 09:08:07,457 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-21 09:08:07,457 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-21 09:08:07,458 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-21 09:08:07,458 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-21 09:08:07,458 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-21 09:08:07,458 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-21 09:08:07,458 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-21 09:08:07,462 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:07,482 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-21 09:08:07,482 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-21 09:08:07,483 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-21 09:08:07,488 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-21 09:08:07,489 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2022-11-21 09:08:07,489 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-21 09:08:07,489 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:07,491 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-21 09:08:07,491 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-21 09:08:07,491 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-21 09:08:07,492 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-21 09:08:07,492 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2022-11-21 09:08:07,500 INFO L748 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~a~0#1, main_~b~0#1, main_~x~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;main_~a~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := 0; 6#L18-2true [2022-11-21 09:08:07,501 INFO L750 eck$LassoCheckResult]: Loop: 6#L18-2true assume !!(main_~x~0#1 > 0); 4#L18true assume !(main_~a~0#1 >= 0);main_~x~0#1 := main_~x~0#1 - 1;main_~a~0#1 := 1; 6#L18-2true [2022-11-21 09:08:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:07,517 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-11-21 09:08:07,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:07,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877788246] [2022-11-21 09:08:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:07,612 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 09:08:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:07,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 09:08:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1335, now seen corresponding path program 1 times [2022-11-21 09:08:07,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:07,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18782430] [2022-11-21 09:08:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:07,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:07,664 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 09:08:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:07,679 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 09:08:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash 925817, now seen corresponding path program 1 times [2022-11-21 09:08:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:07,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939389190] [2022-11-21 09:08:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:07,691 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 09:08:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:07,696 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 09:08:07,763 INFO L210 LassoAnalysis]: Preferences: [2022-11-21 09:08:07,763 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-21 09:08:07,763 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-21 09:08:07,764 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-21 09:08:07,764 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-21 09:08:07,764 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:07,764 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-21 09:08:07,764 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-21 09:08:07,764 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration1_Loop [2022-11-21 09:08:07,765 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-21 09:08:07,765 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-21 09:08:07,782 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:07,798 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:07,851 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-21 09:08:07,852 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-21 09:08:07,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:07,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:07,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:07,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-21 09:08:07,884 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-21 09:08:07,884 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:07,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:07,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:07,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:07,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:07,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-21 09:08:07,971 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-21 09:08:07,971 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:08,002 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-21 09:08:08,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:08,009 INFO L210 LassoAnalysis]: Preferences: [2022-11-21 09:08:08,010 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-21 09:08:08,010 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-21 09:08:08,010 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-21 09:08:08,010 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-21 09:08:08,010 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:08,010 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-21 09:08:08,011 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-21 09:08:08,011 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration1_Loop [2022-11-21 09:08:08,011 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-21 09:08:08,011 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-21 09:08:08,013 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:08,022 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:08,110 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-21 09:08:08,114 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-21 09:08:08,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:08,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:08,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:08,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-21 09:08:08,122 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 [2022-11-21 09:08:08,141 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-21 09:08:08,141 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-21 09:08:08,142 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-21 09:08:08,142 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-21 09:08:08,142 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-21 09:08:08,145 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-21 09:08:08,145 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-21 09:08:08,159 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-21 09:08:08,166 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-21 09:08:08,166 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-21 09:08:08,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:08,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:08,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:08,212 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-21 09:08:08,212 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-21 09:08:08,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-21 09:08:08,213 INFO L513 LassoAnalysis]: Proved termination. [2022-11-21 09:08:08,213 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~a~0#1) = -1*ULTIMATE.start_main_~a~0#1 Supporting invariants [] [2022-11-21 09:08:08,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2022-11-21 09:08:08,222 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-21 09:08:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:08:08,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 09:08:08,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:08:08,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:08:08,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:08,360 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-11-21 09:08:08,362 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:08,419 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 38 states and 55 transitions. Complement of second has 6 states. [2022-11-21 09:08:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-11-21 09:08:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2022-11-21 09:08:08,432 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 2 letters. Loop has 2 letters. [2022-11-21 09:08:08,433 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-21 09:08:08,433 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 4 letters. Loop has 2 letters. [2022-11-21 09:08:08,434 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-21 09:08:08,434 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 2 letters. Loop has 4 letters. [2022-11-21 09:08:08,434 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-21 09:08:08,435 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 38 states and 55 transitions. [2022-11-21 09:08:08,441 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-21 09:08:08,446 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 38 states to 14 states and 20 transitions. [2022-11-21 09:08:08,447 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2022-11-21 09:08:08,448 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2022-11-21 09:08:08,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2022-11-21 09:08:08,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-21 09:08:08,449 INFO L218 hiAutomatonCegarLoop]: Abstraction has 14 states and 20 transitions. [2022-11-21 09:08:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2022-11-21 09:08:08,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-21 09:08:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2022-11-21 09:08:08,478 INFO L240 hiAutomatonCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-11-21 09:08:08,478 INFO L428 stractBuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-11-21 09:08:08,478 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-21 09:08:08,479 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 19 transitions. [2022-11-21 09:08:08,479 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-21 09:08:08,479 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-21 09:08:08,479 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-21 09:08:08,480 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2022-11-21 09:08:08,480 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-11-21 09:08:08,480 INFO L748 eck$LassoCheckResult]: Stem: 89#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 90#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~a~0#1, main_~b~0#1, main_~x~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;main_~a~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := 0; 96#L18-2 assume !!(main_~x~0#1 > 0); 85#L18 assume main_~a~0#1 >= 0; 86#L20 main_#t~nondet2#1 := 1; 94#L20-6 [2022-11-21 09:08:08,481 INFO L750 eck$LassoCheckResult]: Loop: 94#L20-6 main_~a~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1;main_~x~0#1 := main_~x~0#1 + main_~a~0#1; 91#L18-2 assume !!(main_~x~0#1 > 0); 92#L18 assume main_~a~0#1 >= 0; 97#L20 main_#t~nondet2#1 := 1; 94#L20-6 [2022-11-21 09:08:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 28699755, now seen corresponding path program 1 times [2022-11-21 09:08:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:08,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965497225] [2022-11-21 09:08:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:08,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:08,487 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 09:08:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:08,491 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 09:08:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1858064, now seen corresponding path program 1 times [2022-11-21 09:08:08,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783541438] [2022-11-21 09:08:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:08,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:08,504 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 09:08:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:08,520 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 09:08:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash 584188282, now seen corresponding path program 1 times [2022-11-21 09:08:08,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:08,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002933936] [2022-11-21 09:08:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:08,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:08,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 09:08:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 09:08:08,546 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 09:08:08,610 INFO L210 LassoAnalysis]: Preferences: [2022-11-21 09:08:08,610 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-21 09:08:08,611 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-21 09:08:08,612 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-21 09:08:08,612 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-21 09:08:08,612 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:08,612 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-21 09:08:08,612 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-21 09:08:08,612 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration2_Loop [2022-11-21 09:08:08,612 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-21 09:08:08,612 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-21 09:08:08,616 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:08,678 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-21 09:08:08,678 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-21 09:08:08,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:08,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:08,692 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-21 09:08:08,692 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:08,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-21 09:08:08,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:08,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:08,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:08,746 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-21 09:08:08,746 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:08,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-11-21 09:08:08,939 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-21 09:08:08,939 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_~a~0#1=4, ULTIMATE.start_main_#t~nondet2#1=1} Honda state: {ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_~a~0#1=4, ULTIMATE.start_main_#t~nondet2#1=1} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0#1=1, ULTIMATE.start_main_~a~0#1=0, ULTIMATE.start_main_#t~nondet2#1=0}, {ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_~a~0#1=1, ULTIMATE.start_main_#t~nondet2#1=0}, {ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_~a~0#1=-4, ULTIMATE.start_main_#t~nondet2#1=0}] Lambdas: [1, 4, 0] Nus: [0, 1] [2022-11-21 09:08:08,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:08,995 INFO L210 LassoAnalysis]: Preferences: [2022-11-21 09:08:08,995 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-21 09:08:08,996 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-21 09:08:08,996 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-21 09:08:08,996 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-21 09:08:08,996 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:08,996 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-21 09:08:08,996 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-21 09:08:08,997 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration2_Lasso [2022-11-21 09:08:08,997 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-21 09:08:08,997 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-21 09:08:08,998 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:09,001 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:09,020 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:09,023 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:09,027 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-21 09:08:09,103 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-21 09:08:09,103 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-21 09:08:09,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:09,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:09,107 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:09,117 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-21 09:08:09,117 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:09,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-21 09:08:09,143 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-21 09:08:09,143 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet1#1=0} Honda state: {ULTIMATE.start_main_#t~nondet1#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-21 09:08:09,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:09,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:09,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:09,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:09,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-21 09:08:09,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2022-11-21 09:08:09,193 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-21 09:08:09,193 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:09,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:09,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:09,235 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:09,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-21 09:08:09,241 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-21 09:08:09,241 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:09,317 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-21 09:08:09,317 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_#t~nondet2#1=0, ULTIMATE.start_main_~a~0#1=0} Honda state: {ULTIMATE.start_main_~x~0#1=16, ULTIMATE.start_main_#t~nondet2#1=1, ULTIMATE.start_main_~a~0#1=1} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_#t~nondet2#1=0, ULTIMATE.start_main_~a~0#1=0}, {ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_#t~nondet2#1=0, ULTIMATE.start_main_~a~0#1=0}, {ULTIMATE.start_main_~x~0#1=1, ULTIMATE.start_main_#t~nondet2#1=0, ULTIMATE.start_main_~a~0#1=0}] Lambdas: [8, 15, 1] Nus: [1, 0] [2022-11-21 09:08:09,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:09,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:09,330 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:09,349 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-21 09:08:09,349 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:09,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-21 09:08:09,371 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-21 09:08:09,371 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: [] [2022-11-21 09:08:09,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:09,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:09,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:09,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:09,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-21 09:08:09,388 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-21 09:08:09,389 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:09,410 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-21 09:08:09,410 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet0#1=0} Honda state: {ULTIMATE.start_main_#t~nondet0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-21 09:08:09,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:09,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 09:08:09,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:09,417 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 09:08:09,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-21 09:08:09,424 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-21 09:08:09,424 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-21 09:08:09,447 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-21 09:08:09,447 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~b~0#1=0} Honda state: {ULTIMATE.start_main_~b~0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-21 09:08:09,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2022-11-21 09:08:09,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.11 09:08:09 BoogieIcfgContainer [2022-11-21 09:08:09,470 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-21 09:08:09,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 09:08:09,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 09:08:09,471 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 09:08:09,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:08:07" (3/4) ... [2022-11-21 09:08:09,474 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-11-21 09:08:09,507 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 09:08:09,514 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 09:08:09,515 INFO L158 Benchmark]: Toolchain (without parser) took 2699.01ms. Allocated memory was 163.6MB in the beginning and 216.0MB in the end (delta: 52.4MB). Free memory was 131.9MB in the beginning and 176.1MB in the end (delta: -44.2MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2022-11-21 09:08:09,516 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 163.6MB. Free memory is still 106.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 09:08:09,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.30ms. Allocated memory is still 163.6MB. Free memory was 131.9MB in the beginning and 122.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 09:08:09,516 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.17ms. Allocated memory is still 163.6MB. Free memory was 122.6MB in the beginning and 121.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 09:08:09,517 INFO L158 Benchmark]: Boogie Preprocessor took 31.27ms. Allocated memory is still 163.6MB. Free memory was 121.3MB in the beginning and 120.6MB in the end (delta: 711.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 09:08:09,517 INFO L158 Benchmark]: RCFGBuilder took 275.79ms. Allocated memory is still 163.6MB. Free memory was 120.6MB in the beginning and 111.5MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-21 09:08:09,518 INFO L158 Benchmark]: BuchiAutomizer took 2103.07ms. Allocated memory was 163.6MB in the beginning and 216.0MB in the end (delta: 52.4MB). Free memory was 110.8MB in the beginning and 178.2MB in the end (delta: -67.4MB). Peak memory consumption was 68.9MB. Max. memory is 16.1GB. [2022-11-21 09:08:09,518 INFO L158 Benchmark]: Witness Printer took 43.47ms. Allocated memory is still 216.0MB. Free memory was 177.2MB in the beginning and 176.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 09:08:09,520 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 163.6MB. Free memory is still 106.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.30ms. Allocated memory is still 163.6MB. Free memory was 131.9MB in the beginning and 122.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.17ms. Allocated memory is still 163.6MB. Free memory was 122.6MB in the beginning and 121.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.27ms. Allocated memory is still 163.6MB. Free memory was 121.3MB in the beginning and 120.6MB in the end (delta: 711.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 275.79ms. Allocated memory is still 163.6MB. Free memory was 120.6MB in the beginning and 111.5MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 2103.07ms. Allocated memory was 163.6MB in the beginning and 216.0MB in the end (delta: 52.4MB). Free memory was 110.8MB in the beginning and 178.2MB in the end (delta: -67.4MB). Peak memory consumption was 68.9MB. Max. memory is 16.1GB. * Witness Printer took 43.47ms. Allocated memory is still 216.0MB. Free memory was 177.2MB in the beginning and 176.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (0 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * a and consists of 4 locations. The remainder module has 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.0s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 1.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 9 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital21 mio100 ax100 hnf100 lsp76 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq164 hnf92 smp100 dnf100 smp100 tf108 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 97ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.7s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - GeometricNonTerminationArgumentResult [Line: 18]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@1ac35da8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@581f31a9=0, a=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@aa897be=0, b=0} State at position 1 is {x=16, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@1ac35da8=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@581f31a9=0, a=1, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@aa897be=0, b=0} For i>1, the state at position i is {x=16 + sum_{k=0}^i 1, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@1ac35da8=1 + sum_{k=0}^i 0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@581f31a9=0 + sum_{k=0}^i 0, a=1 + sum_{k=0}^i 0, \result=0 + sum_{k=0}^i 0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@aa897be=0 + sum_{k=0}^i 0, b=0 + sum_{k=0}^i 0} - StatisticsResult: NonterminationArgumentStatistics Unbounded Execution 1GEVs Lambdas: [8, 15, 1] Mus: [1, 0] - NonterminatingLassoResult [Line: 18]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L13] int a, b, x; [L14] a = __VERIFIER_nondet_int() [L15] x = __VERIFIER_nondet_int() [L16] b = 0 [L17] COND TRUE x>0 [L18] COND TRUE a >= 0 [L20] a = 0^1 Loop: [L20] a = 0^1 [L21] x= x+a [L17] COND TRUE x>0 [L18] COND TRUE a >= 0 [L20] a = 0^1 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2022-11-21 09:08:09,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_783d29b4-7602-43a3-8bac-d159ad859d24/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)