./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/Ex07.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Ex07.c -s /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f77d0d21d7cb1d6a29608eb65655982c4edaf4ed ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:15:51,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:15:51,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:15:51,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:15:51,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:15:51,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:15:51,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:15:51,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:15:51,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:15:51,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:15:51,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:15:51,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:15:51,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:15:51,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:15:51,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:15:51,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:15:51,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:15:51,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:15:51,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:15:51,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:15:51,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:15:51,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:15:51,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:15:51,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:15:51,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:15:51,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:15:51,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:15:51,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:15:51,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:15:51,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:15:51,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:15:51,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:15:51,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:15:51,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:15:51,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:15:51,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:15:51,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:15:51,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:15:51,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:15:51,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:15:51,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:15:51,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 18:15:51,944 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:15:51,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:15:51,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:15:51,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:15:51,945 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:15:51,946 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 18:15:51,946 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 18:15:51,946 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 18:15:51,946 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 18:15:51,946 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 18:15:51,946 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 18:15:51,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:15:51,946 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 18:15:51,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:15:51,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:15:51,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 18:15:51,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 18:15:51,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 18:15:51,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:15:51,947 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 18:15:51,947 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:15:51,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 18:15:51,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:15:51,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:15:51,948 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 18:15:51,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:15:51,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:15:51,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:15:51,948 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 18:15:51,949 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 18:15:51,949 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f77d0d21d7cb1d6a29608eb65655982c4edaf4ed [2019-12-07 18:15:52,046 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:15:52,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:15:52,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:15:52,059 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:15:52,059 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:15:52,060 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/Ex07.c [2019-12-07 18:15:52,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/data/2cefa0cf6/fd254dc465274e13a7383886afcbda9d/FLAGaeb76d4d3 [2019-12-07 18:15:52,411 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:15:52,412 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/sv-benchmarks/c/termination-restricted-15/Ex07.c [2019-12-07 18:15:52,415 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/data/2cefa0cf6/fd254dc465274e13a7383886afcbda9d/FLAGaeb76d4d3 [2019-12-07 18:15:52,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/data/2cefa0cf6/fd254dc465274e13a7383886afcbda9d [2019-12-07 18:15:52,425 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:15:52,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:15:52,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:15:52,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:15:52,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:15:52,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f146fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52, skipping insertion in model container [2019-12-07 18:15:52,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:15:52,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:15:52,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:15:52,556 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:15:52,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:15:52,610 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:15:52,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52 WrapperNode [2019-12-07 18:15:52,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:15:52,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:15:52,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:15:52,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:15:52,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:15:52,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:15:52,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:15:52,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:15:52,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... [2019-12-07 18:15:52,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:15:52,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:15:52,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:15:52,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:15:52,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:52,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:15:52,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:15:52,778 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:15:52,778 INFO L287 CfgBuilder]: Removed 5 assume(true) statements. [2019-12-07 18:15:52,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:15:52 BoogieIcfgContainer [2019-12-07 18:15:52,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:15:52,779 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 18:15:52,779 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 18:15:52,781 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 18:15:52,782 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 18:15:52,782 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 06:15:52" (1/3) ... [2019-12-07 18:15:52,783 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@a6755be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 06:15:52, skipping insertion in model container [2019-12-07 18:15:52,783 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 18:15:52,783 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:15:52" (2/3) ... [2019-12-07 18:15:52,783 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@a6755be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 06:15:52, skipping insertion in model container [2019-12-07 18:15:52,783 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 18:15:52,783 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:15:52" (3/3) ... [2019-12-07 18:15:52,784 INFO L371 chiAutomizerObserver]: Analyzing ICFG Ex07.c [2019-12-07 18:15:52,813 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 18:15:52,813 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 18:15:52,813 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 18:15:52,813 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:15:52,813 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:15:52,813 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 18:15:52,813 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:15:52,814 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 18:15:52,822 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-12-07 18:15:52,835 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:15:52,835 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:15:52,835 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:15:52,839 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 18:15:52,839 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:15:52,839 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 18:15:52,839 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-12-07 18:15:52,840 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:15:52,840 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:15:52,840 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:15:52,840 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 18:15:52,840 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:15:52,845 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 5#L13-1true [2019-12-07 18:15:52,845 INFO L796 eck$LassoCheckResult]: Loop: 5#L13-1true assume !!(0 != ~unnamed0~0~true); 3#L10true assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 9#L10-2true assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 5#L13-1true [2019-12-07 18:15:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:52,849 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-12-07 18:15:52,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:52,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268423145] [2019-12-07 18:15:52,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:52,915 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash 39823, now seen corresponding path program 1 times [2019-12-07 18:15:52,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:52,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584495416] [2019-12-07 18:15:52,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:15:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:15:52,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584495416] [2019-12-07 18:15:52,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:15:52,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 18:15:52,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189415914] [2019-12-07 18:15:52,957 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 18:15:52,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:15:52,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:15:52,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:15:52,970 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-12-07 18:15:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:15:52,987 INFO L93 Difference]: Finished difference Result 7 states and 10 transitions. [2019-12-07 18:15:52,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:15:52,989 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 10 transitions. [2019-12-07 18:15:52,990 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-12-07 18:15:52,992 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 10 transitions. [2019-12-07 18:15:52,993 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-12-07 18:15:52,993 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-12-07 18:15:52,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2019-12-07 18:15:52,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:15:52,993 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-12-07 18:15:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2019-12-07 18:15:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-12-07 18:15:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 18:15:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-12-07 18:15:53,011 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-12-07 18:15:53,011 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-12-07 18:15:53,011 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 18:15:53,011 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2019-12-07 18:15:53,012 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-12-07 18:15:53,012 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:15:53,012 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:15:53,012 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 18:15:53,012 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:15:53,012 INFO L794 eck$LassoCheckResult]: Stem: 27#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 28#L13-1 [2019-12-07 18:15:53,012 INFO L796 eck$LassoCheckResult]: Loop: 28#L13-1 assume !!(0 != ~unnamed0~0~true); 24#L10 assume !(main_~i~0 > 0); 26#L10-2 assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 28#L13-1 [2019-12-07 18:15:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2019-12-07 18:15:53,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:53,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093939722] [2019-12-07 18:15:53,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,016 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash 39885, now seen corresponding path program 1 times [2019-12-07 18:15:53,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:53,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001869930] [2019-12-07 18:15:53,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,022 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,023 INFO L82 PathProgramCache]: Analyzing trace with hash 963406, now seen corresponding path program 1 times [2019-12-07 18:15:53,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:53,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251139202] [2019-12-07 18:15:53,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,029 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:53,055 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:15:53,056 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:15:53,056 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:15:53,056 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:15:53,056 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 18:15:53,056 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,056 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:15:53,056 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:15:53,057 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration2_Loop [2019-12-07 18:15:53,057 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:15:53,057 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:15:53,070 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,123 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:15:53,123 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,127 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:15:53,128 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:15:53,134 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:15:53,134 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,138 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:15:53,139 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:15:53,142 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:15:53,142 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,146 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:15:53,146 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,153 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 18:15:53,153 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:15:53,159 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 18:15:53,160 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:15:53,160 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:15:53,160 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:15:53,160 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:15:53,160 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 18:15:53,161 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,161 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:15:53,161 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:15:53,161 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration2_Loop [2019-12-07 18:15:53,161 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:15:53,161 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:15:53,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,201 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:15:53,205 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,209 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:15:53,210 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:15:53,211 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:15:53,211 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:15:53,211 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:15:53,215 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 18:15:53,215 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 18:15:53,219 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,223 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:15:53,225 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:15:53,225 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:15:53,225 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:15:53,225 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:15:53,225 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:15:53,226 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:15:53,226 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:15:53,229 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 18:15:53,232 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 18:15:53,232 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,240 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 18:15:53,240 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 18:15:53,241 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 18:15:53,241 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-12-07 18:15:53,244 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 18:15:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:15:53,268 WARN L262 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 18:15:53,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:15:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:15:53,276 WARN L262 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:15:53,276 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:15:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:15:53,290 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-12-07 18:15:53,290 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 4 states. [2019-12-07 18:15:53,322 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 19 states and 26 transitions. Complement of second has 8 states. [2019-12-07 18:15:53,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 18:15:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 18:15:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-12-07 18:15:53,324 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 3 letters. [2019-12-07 18:15:53,325 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:15:53,325 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2019-12-07 18:15:53,326 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:15:53,326 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 6 letters. [2019-12-07 18:15:53,326 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:15:53,326 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 26 transitions. [2019-12-07 18:15:53,327 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-12-07 18:15:53,328 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 13 states and 17 transitions. [2019-12-07 18:15:53,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2019-12-07 18:15:53,328 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-12-07 18:15:53,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2019-12-07 18:15:53,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 18:15:53,328 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-12-07 18:15:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2019-12-07 18:15:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-12-07 18:15:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 18:15:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-12-07 18:15:53,330 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-12-07 18:15:53,330 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-12-07 18:15:53,330 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 18:15:53,330 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2019-12-07 18:15:53,331 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-12-07 18:15:53,331 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:15:53,331 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:15:53,331 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-12-07 18:15:53,331 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:15:53,332 INFO L794 eck$LassoCheckResult]: Stem: 91#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 92#L13-1 assume !!(0 != ~unnamed0~0~true); 96#L10 assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 98#L10-2 [2019-12-07 18:15:53,332 INFO L796 eck$LassoCheckResult]: Loop: 98#L10-2 assume !(main_~i~0 < 0); 93#L13-1 assume !!(0 != ~unnamed0~0~true); 94#L10 assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 98#L10-2 [2019-12-07 18:15:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,332 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-12-07 18:15:53,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:53,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933273128] [2019-12-07 18:15:53,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,339 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,339 INFO L82 PathProgramCache]: Analyzing trace with hash 50295, now seen corresponding path program 1 times [2019-12-07 18:15:53,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:53,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496724224] [2019-12-07 18:15:53,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,346 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:53,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,347 INFO L82 PathProgramCache]: Analyzing trace with hash 925775829, now seen corresponding path program 1 times [2019-12-07 18:15:53,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:53,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196967742] [2019-12-07 18:15:53,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,357 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:53,369 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:15:53,369 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:15:53,369 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:15:53,369 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:15:53,370 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 18:15:53,370 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,370 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:15:53,370 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:15:53,370 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration3_Loop [2019-12-07 18:15:53,370 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:15:53,370 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:15:53,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,406 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:15:53,406 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,408 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:15:53,409 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:15:53,412 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 18:15:53,412 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,416 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 18:15:53,416 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,423 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 18:15:53,423 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 18:15:53,428 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 18:15:53,429 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:15:53,429 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:15:53,429 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:15:53,429 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:15:53,429 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 18:15:53,430 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,430 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:15:53,430 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:15:53,430 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex07.c_Iteration3_Loop [2019-12-07 18:15:53,430 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:15:53,430 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:15:53,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:15:53,461 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:15:53,461 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,464 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 18:15:53,465 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:15:53,465 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:15:53,465 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:15:53,465 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:15:53,465 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:15:53,466 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:15:53,466 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:15:53,468 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 18:15:53,471 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-12-07 18:15:53,472 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:15:53,475 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 18:15:53,475 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 18:15:53,475 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 18:15:53,475 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-12-07 18:15:53,477 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 18:15:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:15:53,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 18:15:53,491 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:15:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:15:53,495 WARN L262 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:15:53,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:15:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:15:53,504 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-12-07 18:15:53,504 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7 Second operand 3 states. [2019-12-07 18:15:53,517 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7. Second operand 3 states. Result 18 states and 24 transitions. Complement of second has 4 states. [2019-12-07 18:15:53,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 18:15:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 18:15:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-12-07 18:15:53,518 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-12-07 18:15:53,518 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:15:53,518 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-12-07 18:15:53,518 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:15:53,518 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-12-07 18:15:53,519 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:15:53,519 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 24 transitions. [2019-12-07 18:15:53,519 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-12-07 18:15:53,520 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 18 states and 24 transitions. [2019-12-07 18:15:53,520 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2019-12-07 18:15:53,520 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2019-12-07 18:15:53,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2019-12-07 18:15:53,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 18:15:53,520 INFO L688 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-12-07 18:15:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2019-12-07 18:15:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2019-12-07 18:15:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 18:15:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2019-12-07 18:15:53,522 INFO L711 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-12-07 18:15:53,522 INFO L591 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-12-07 18:15:53,522 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 18:15:53,522 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2019-12-07 18:15:53,523 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:15:53,523 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:15:53,523 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:15:53,523 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-12-07 18:15:53,523 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:15:53,523 INFO L794 eck$LassoCheckResult]: Stem: 160#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 161#L13-1 assume !!(0 != ~unnamed0~0~true); 168#L10 assume !(main_~i~0 > 0); 156#L10-2 [2019-12-07 18:15:53,523 INFO L796 eck$LassoCheckResult]: Loop: 156#L10-2 assume !(main_~i~0 < 0); 162#L13-1 assume !!(0 != ~unnamed0~0~true); 155#L10 assume !(main_~i~0 > 0); 156#L10-2 [2019-12-07 18:15:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,523 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-12-07 18:15:53,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:53,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785054936] [2019-12-07 18:15:53,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,528 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash 50297, now seen corresponding path program 1 times [2019-12-07 18:15:53,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:53,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141563519] [2019-12-07 18:15:53,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,533 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:15:53,534 INFO L82 PathProgramCache]: Analyzing trace with hash 925835413, now seen corresponding path program 1 times [2019-12-07 18:15:53,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:15:53,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413794805] [2019-12-07 18:15:53,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:15:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:15:53,540 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:15:53,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 06:15:53 BoogieIcfgContainer [2019-12-07 18:15:53,579 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 18:15:53,579 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:15:53,579 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:15:53,580 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:15:53,580 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:15:52" (3/4) ... [2019-12-07 18:15:53,582 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-12-07 18:15:53,611 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_18daf571-e753-440f-9478-68c3b9cdbe07/bin/uautomizer/witness.graphml [2019-12-07 18:15:53,611 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:15:53,613 INFO L168 Benchmark]: Toolchain (without parser) took 1186.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 945.1 MB in the beginning and 942.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 109.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:15:53,613 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:15:53,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 945.1 MB in the beginning and 1.1 GB in the end (delta: -157.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:15:53,614 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.09 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:15:53,614 INFO L168 Benchmark]: Boogie Preprocessor took 13.25 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:15:53,615 INFO L168 Benchmark]: RCFGBuilder took 133.42 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:15:53,615 INFO L168 Benchmark]: BuchiAutomizer took 800.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 942.1 MB in the end (delta: 141.5 MB). Peak memory consumption was 141.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:15:53,616 INFO L168 Benchmark]: Witness Printer took 31.51 ms. Allocated memory is still 1.1 GB. Free memory is still 942.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:15:53,618 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 183.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 945.1 MB in the beginning and 1.1 GB in the end (delta: -157.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.09 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.25 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 133.42 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 800.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 942.1 MB in the end (delta: 141.5 MB). Peak memory consumption was 141.5 MB. Max. memory is 11.5 GB. * Witness Printer took 31.51 ms. Allocated memory is still 1.1 GB. Free memory is still 942.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * i and consists of 5 locations. One deterministic module has affine ranking function i and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 14 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.7s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 0.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 14 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 16 SDtfs, 13 SDslu, 5 SDs, 0 SdLazy, 24 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax220 hnf100 lsp45 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 13ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@d2915b8=0, \result=0, i=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 9]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() [L9] COND TRUE \read(true) [L10] COND FALSE !(i > 0) Loop: [L13] COND FALSE !(i < 0) [L9] COND TRUE \read(true) [L10] COND FALSE !(i > 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...