./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/ssh-simplified/s3_srvr_1b.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/ssh-simplified/s3_srvr_1b.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 32bit --witnessprinter.graph.data.programhash 7cac24a49d7b473be85039a3051680fd486b81b3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:22:48,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 12:22:48,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 12:22:48,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 12:22:48,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 12:22:48,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 12:22:48,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 12:22:48,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 12:22:48,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 12:22:48,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 12:22:48,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 12:22:48,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 12:22:48,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 12:22:48,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 12:22:48,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 12:22:48,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 12:22:48,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 12:22:48,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 12:22:48,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 12:22:48,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 12:22:48,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 12:22:48,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 12:22:48,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 12:22:48,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 12:22:48,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 12:22:48,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 12:22:48,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 12:22:48,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 12:22:48,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 12:22:48,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 12:22:48,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 12:22:48,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 12:22:48,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 12:22:48,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 12:22:48,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 12:22:48,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 12:22:48,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 12:22:48,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 12:22:48,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 12:22:48,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 12:22:48,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 12:22:48,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-12-07 12:22:48,736 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 12:22:48,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 12:22:48,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 12:22:48,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 12:22:48,737 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 12:22:48,738 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 12:22:48,738 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 12:22:48,738 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 12:22:48,738 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 12:22:48,738 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 12:22:48,738 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 12:22:48,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 12:22:48,739 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 12:22:48,739 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 12:22:48,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 12:22:48,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 12:22:48,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 12:22:48,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 12:22:48,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 12:22:48,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 12:22:48,740 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 12:22:48,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 12:22:48,741 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 12:22:48,741 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 12:22:48,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 12:22:48,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 12:22:48,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 12:22:48,741 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 12:22:48,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 12:22:48,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 12:22:48,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 12:22:48,742 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 12:22:48,743 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 12:22:48,743 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_a5fc3083-112a-41fe-b033-208c6893f076/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cac24a49d7b473be85039a3051680fd486b81b3 [2019-12-07 12:22:48,853 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 12:22:48,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 12:22:48,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 12:22:48,864 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 12:22:48,864 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 12:22:48,865 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/../../sv-benchmarks/c/ssh-simplified/s3_srvr_1b.cil.c [2019-12-07 12:22:48,902 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/data/6d7c7bbfa/f544279caa074d1a9492d2a7e820017c/FLAGc3daa06c5 [2019-12-07 12:22:49,246 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 12:22:49,247 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/sv-benchmarks/c/ssh-simplified/s3_srvr_1b.cil.c [2019-12-07 12:22:49,252 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/data/6d7c7bbfa/f544279caa074d1a9492d2a7e820017c/FLAGc3daa06c5 [2019-12-07 12:22:49,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/data/6d7c7bbfa/f544279caa074d1a9492d2a7e820017c [2019-12-07 12:22:49,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 12:22:49,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 12:22:49,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 12:22:49,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 12:22:49,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 12:22:49,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e3d67c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49, skipping insertion in model container [2019-12-07 12:22:49,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 12:22:49,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 12:22:49,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:22:49,396 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 12:22:49,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:22:49,459 INFO L208 MainTranslator]: Completed translation [2019-12-07 12:22:49,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49 WrapperNode [2019-12-07 12:22:49,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 12:22:49,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 12:22:49,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 12:22:49,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 12:22:49,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 12:22:49,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 12:22:49,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 12:22:49,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 12:22:49,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... [2019-12-07 12:22:49,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 12:22:49,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 12:22:49,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 12:22:49,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 12:22:49,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:49,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 12:22:49,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 12:22:49,657 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 12:22:49,658 INFO L287 CfgBuilder]: Removed 5 assume(true) statements. [2019-12-07 12:22:49,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:22:49 BoogieIcfgContainer [2019-12-07 12:22:49,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 12:22:49,659 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 12:22:49,659 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 12:22:49,661 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 12:22:49,662 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 12:22:49,662 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 12:22:49" (1/3) ... [2019-12-07 12:22:49,662 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7dc51ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 12:22:49, skipping insertion in model container [2019-12-07 12:22:49,663 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 12:22:49,663 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:49" (2/3) ... [2019-12-07 12:22:49,663 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7dc51ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 12:22:49, skipping insertion in model container [2019-12-07 12:22:49,663 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 12:22:49,663 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:22:49" (3/3) ... [2019-12-07 12:22:49,664 INFO L371 chiAutomizerObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2019-12-07 12:22:49,692 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 12:22:49,692 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 12:22:49,692 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 12:22:49,692 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 12:22:49,692 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 12:22:49,692 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 12:22:49,692 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 12:22:49,693 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 12:22:49,702 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2019-12-07 12:22:49,715 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2019-12-07 12:22:49,715 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 12:22:49,715 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 12:22:49,720 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 12:22:49,720 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-12-07 12:22:49,720 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 12:22:49,720 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2019-12-07 12:22:49,722 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2019-12-07 12:22:49,722 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 12:22:49,722 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 12:22:49,722 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 12:22:49,722 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-12-07 12:22:49,727 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 21#L99true [2019-12-07 12:22:49,728 INFO L796 eck$LassoCheckResult]: Loop: 21#L99true assume !false; 6#L18true assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 19#L24true assume 8466 == main_~s__state~0; 24#L25true assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 20#L57-1true assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 21#L99true [2019-12-07 12:22:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:49,733 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-12-07 12:22:49,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:49,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609967536] [2019-12-07 12:22:49,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:49,801 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash 38329778, now seen corresponding path program 1 times [2019-12-07 12:22:49,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:49,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233694402] [2019-12-07 12:22:49,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:49,811 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash 925833459, now seen corresponding path program 1 times [2019-12-07 12:22:49,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:49,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132752244] [2019-12-07 12:22:49,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:49,820 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:49,864 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 12:22:49,865 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 12:22:49,865 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 12:22:49,865 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 12:22:49,865 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 12:22:49,865 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:49,865 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 12:22:49,865 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 12:22:49,865 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration1_Loop [2019-12-07 12:22:49,865 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 12:22:49,865 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 12:22:49,879 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 12:22:49,886 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 12:22:49,891 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 12:22:49,939 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 12:22:49,939 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:49,944 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 12:22:49,944 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 12:22:49,951 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 12:22:49,951 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~s__hit~0=7} Honda state: {ULTIMATE.start_main_~s__hit~0=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:49,955 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 12:22:49,955 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:49,962 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 12:22:49,962 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 12:22:49,968 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 12:22:49,969 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 12:22:49,969 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 12:22:49,969 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 12:22:49,969 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 12:22:49,969 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 12:22:49,970 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:49,970 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 12:22:49,970 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 12:22:49,970 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration1_Loop [2019-12-07 12:22:49,970 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 12:22:49,970 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 12:22:49,971 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 12:22:49,974 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 12:22:49,979 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 12:22:50,016 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 12:22:50,020 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:50,024 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 12:22:50,026 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 12:22:50,026 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 12:22:50,026 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 12:22:50,026 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-12-07 12:22:50,026 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 12:22:50,028 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-12-07 12:22:50,028 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 12:22:50,031 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:50,035 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 12:22:50,036 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 12:22:50,036 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 12:22:50,036 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 12:22:50,036 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 12:22:50,036 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 12:22:50,037 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 12:22:50,037 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 12:22:50,039 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 12:22:50,044 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 12:22:50,044 INFO L444 ModelExtractionUtils]: 0 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_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:50,047 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 12:22:50,047 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 12:22:50,047 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 12:22:50,048 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~blastFlag~0) = -1*ULTIMATE.start_main_~blastFlag~0 + 1 Supporting invariants [] [2019-12-07 12:22:50,051 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 12:22:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 12:22:50,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 12:22:50,092 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:50,110 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 12:22:50,121 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 12:22:50,122 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states. Second operand 4 states. [2019-12-07 12:22:50,171 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 22 states.. Second operand 4 states. Result 51 states and 83 transitions. Complement of second has 5 states. [2019-12-07 12:22:50,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 12:22:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 12:22:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2019-12-07 12:22:50,174 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 45 transitions. Stem has 1 letters. Loop has 5 letters. [2019-12-07 12:22:50,175 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:50,175 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 45 transitions. Stem has 6 letters. Loop has 5 letters. [2019-12-07 12:22:50,175 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:50,175 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 45 transitions. Stem has 1 letters. Loop has 10 letters. [2019-12-07 12:22:50,175 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:50,176 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 83 transitions. [2019-12-07 12:22:50,178 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2019-12-07 12:22:50,181 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 37 states and 58 transitions. [2019-12-07 12:22:50,182 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2019-12-07 12:22:50,182 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2019-12-07 12:22:50,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 58 transitions. [2019-12-07 12:22:50,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 12:22:50,183 INFO L688 BuchiCegarLoop]: Abstraction has 37 states and 58 transitions. [2019-12-07 12:22:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 58 transitions. [2019-12-07 12:22:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-12-07 12:22:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 12:22:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 56 transitions. [2019-12-07 12:22:50,202 INFO L711 BuchiCegarLoop]: Abstraction has 35 states and 56 transitions. [2019-12-07 12:22:50,202 INFO L591 BuchiCegarLoop]: Abstraction has 35 states and 56 transitions. [2019-12-07 12:22:50,203 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 12:22:50,203 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 56 transitions. [2019-12-07 12:22:50,204 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2019-12-07 12:22:50,204 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 12:22:50,204 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 12:22:50,204 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 12:22:50,204 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-12-07 12:22:50,204 INFO L794 eck$LassoCheckResult]: Stem: 139#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 140#L99 assume !false; 125#L18 [2019-12-07 12:22:50,204 INFO L796 eck$LassoCheckResult]: Loop: 125#L18 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 126#L24 assume 8466 == main_~s__state~0; 145#L25 assume !(0 == main_~blastFlag~0); 147#L57-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 116#L99 assume !false; 125#L18 [2019-12-07 12:22:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-12-07 12:22:50,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:50,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849514125] [2019-12-07 12:22:50,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,209 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash 43059010, now seen corresponding path program 1 times [2019-12-07 12:22:50,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:50,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527117523] [2019-12-07 12:22:50,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,214 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1363931911, now seen corresponding path program 1 times [2019-12-07 12:22:50,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:50,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135553355] [2019-12-07 12:22:50,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:50,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135553355] [2019-12-07 12:22:50,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:22:50,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 12:22:50,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148983087] [2019-12-07 12:22:50,260 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 12:22:50,260 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 12:22:50,260 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 12:22:50,260 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 12:22:50,260 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 12:22:50,260 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,260 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 12:22:50,260 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 12:22:50,261 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration2_Loop [2019-12-07 12:22:50,261 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 12:22:50,261 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 12:22:50,262 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 12:22:50,265 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 12:22:50,269 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 12:22:50,314 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 12:22:50,314 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:50,317 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 12:22:50,317 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 12:22:50,321 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 12:22:50,322 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~s__hit~0=7} Honda state: {ULTIMATE.start_main_~s__hit~0=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:50,326 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 12:22:50,326 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 12:22:50,331 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 12:22:50,331 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~blastFlag~0=1} Honda state: {ULTIMATE.start_main_~blastFlag~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:50,335 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 12:22:50,336 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:50,343 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 12:22:50,344 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 12:22:50,349 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 12:22:50,350 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 12:22:50,350 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 12:22:50,350 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 12:22:50,350 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 12:22:50,351 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 12:22:50,351 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,351 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 12:22:50,351 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 12:22:50,351 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration2_Loop [2019-12-07 12:22:50,351 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 12:22:50,351 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 12:22:50,352 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 12:22:50,355 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 12:22:50,359 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 12:22:50,401 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 12:22:50,401 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:50,404 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 12:22:50,406 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 12:22:50,406 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 12:22:50,406 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 12:22:50,406 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-12-07 12:22:50,406 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 12:22:50,407 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-12-07 12:22:50,407 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 12:22:50,409 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/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 12:22:50,413 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 12:22:50,414 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 12:22:50,415 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 12:22:50,415 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 12:22:50,415 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-12-07 12:22:50,415 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 12:22:50,416 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-12-07 12:22:50,416 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 12:22:50,418 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,422 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 12:22:50,423 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 12:22:50,423 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 12:22:50,423 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 12:22:50,423 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 12:22:50,424 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 12:22:50,424 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 12:22:50,425 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 12:22:50,426 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 12:22:50,428 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 12:22:50,429 INFO L444 ModelExtractionUtils]: 0 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_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,433 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 12:22:50,434 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 12:22:50,434 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 12:22:50,434 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8561 Supporting invariants [] [2019-12-07 12:22:50,435 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 12:22:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 12:22:50,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 12:22:50,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:50,468 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 12:22:50,468 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-12-07 12:22:50,468 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 56 transitions. cyclomatic complexity: 23 Second operand 5 states. [2019-12-07 12:22:50,510 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 56 transitions. cyclomatic complexity: 23. Second operand 5 states. Result 103 states and 154 transitions. Complement of second has 7 states. [2019-12-07 12:22:50,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 12:22:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 12:22:50,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 24 transitions. [2019-12-07 12:22:50,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 24 transitions. Stem has 2 letters. Loop has 5 letters. [2019-12-07 12:22:50,511 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:50,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 24 transitions. Stem has 7 letters. Loop has 5 letters. [2019-12-07 12:22:50,512 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:50,512 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 24 transitions. Stem has 2 letters. Loop has 10 letters. [2019-12-07 12:22:50,512 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:50,512 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 103 states and 154 transitions. [2019-12-07 12:22:50,515 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2019-12-07 12:22:50,516 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 103 states to 76 states and 120 transitions. [2019-12-07 12:22:50,516 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 32 [2019-12-07 12:22:50,517 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 34 [2019-12-07 12:22:50,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 120 transitions. [2019-12-07 12:22:50,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 12:22:50,517 INFO L688 BuchiCegarLoop]: Abstraction has 76 states and 120 transitions. [2019-12-07 12:22:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states and 120 transitions. [2019-12-07 12:22:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2019-12-07 12:22:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 12:22:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 85 transitions. [2019-12-07 12:22:50,521 INFO L711 BuchiCegarLoop]: Abstraction has 53 states and 85 transitions. [2019-12-07 12:22:50,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:22:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 12:22:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:22:50,524 INFO L87 Difference]: Start difference. First operand 53 states and 85 transitions. Second operand 3 states. [2019-12-07 12:22:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:50,545 INFO L93 Difference]: Finished difference Result 89 states and 127 transitions. [2019-12-07 12:22:50,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:22:50,546 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 89 states and 127 transitions. [2019-12-07 12:22:50,547 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2019-12-07 12:22:50,548 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 89 states to 86 states and 124 transitions. [2019-12-07 12:22:50,549 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2019-12-07 12:22:50,549 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2019-12-07 12:22:50,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 124 transitions. [2019-12-07 12:22:50,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 12:22:50,549 INFO L688 BuchiCegarLoop]: Abstraction has 86 states and 124 transitions. [2019-12-07 12:22:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states and 124 transitions. [2019-12-07 12:22:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-12-07 12:22:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-07 12:22:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 122 transitions. [2019-12-07 12:22:50,554 INFO L711 BuchiCegarLoop]: Abstraction has 84 states and 122 transitions. [2019-12-07 12:22:50,554 INFO L591 BuchiCegarLoop]: Abstraction has 84 states and 122 transitions. [2019-12-07 12:22:50,554 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 12:22:50,554 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 84 states and 122 transitions. [2019-12-07 12:22:50,555 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2019-12-07 12:22:50,556 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 12:22:50,556 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 12:22:50,556 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 12:22:50,556 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2019-12-07 12:22:50,556 INFO L794 eck$LassoCheckResult]: Stem: 468#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 469#L99 assume !false; 501#L18 [2019-12-07 12:22:50,556 INFO L796 eck$LassoCheckResult]: Loop: 501#L18 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 498#L24 assume !(8466 == main_~s__state~0); 496#L29 assume 8512 == main_~s__state~0; 491#L30 main_~tmp___1~0 := main_#t~nondet1;havoc main_#t~nondet1; 443#L69 assume 0 != main_~tmp___1~0;main_~s__state~0 := 8466; 444#L99 assume !false; 501#L18 [2019-12-07 12:22:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 2 times [2019-12-07 12:22:50,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:50,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127109321] [2019-12-07 12:22:50,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,561 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1336146262, now seen corresponding path program 1 times [2019-12-07 12:22:50,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:50,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278004643] [2019-12-07 12:22:50,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,566 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash 669100671, now seen corresponding path program 1 times [2019-12-07 12:22:50,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:50,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471302122] [2019-12-07 12:22:50,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:50,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471302122] [2019-12-07 12:22:50,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:22:50,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 12:22:50,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901429392] [2019-12-07 12:22:50,597 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 12:22:50,597 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 12:22:50,597 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 12:22:50,597 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 12:22:50,597 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 12:22:50,597 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,598 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 12:22:50,598 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 12:22:50,598 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration3_Loop [2019-12-07 12:22:50,598 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 12:22:50,598 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 12:22:50,599 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 12:22:50,603 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 12:22:50,607 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 12:22:50,641 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 12:22:50,641 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,644 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 12:22:50,644 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 12:22:50,650 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 12:22:50,650 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet1=2, ULTIMATE.start_main_~tmp___1~0=2} Honda state: {ULTIMATE.start_main_#t~nondet1=2, ULTIMATE.start_main_~tmp___1~0=2} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,654 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 12:22:50,654 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,660 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 12:22:50,661 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 12:22:50,664 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 12:22:50,665 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 12:22:50,666 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 12:22:50,666 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 12:22:50,666 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 12:22:50,666 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 12:22:50,666 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,666 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 12:22:50,666 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 12:22:50,666 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration3_Loop [2019-12-07 12:22:50,666 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 12:22:50,666 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 12:22:50,667 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 12:22:50,671 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 12:22:50,676 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 12:22:50,708 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 12:22:50,709 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,711 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 12:22:50,713 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 12:22:50,713 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 12:22:50,713 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 12:22:50,713 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-12-07 12:22:50,713 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 12:22:50,715 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-12-07 12:22:50,715 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 12:22:50,718 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,721 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 12:22:50,722 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 12:22:50,722 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 12:22:50,722 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 12:22:50,723 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 12:22:50,723 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 12:22:50,723 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 12:22:50,724 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 12:22:50,725 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 12:22:50,729 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 12:22:50,729 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_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,731 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 12:22:50,731 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 12:22:50,731 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 12:22:50,731 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = 1*ULTIMATE.start_main_~s__state~0 Supporting invariants [] [2019-12-07 12:22:50,733 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 12:22:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 12:22:50,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 12:22:50,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:50,769 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 12:22:50,769 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-12-07 12:22:50,769 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 84 states and 122 transitions. cyclomatic complexity: 44 Second operand 5 states. [2019-12-07 12:22:50,822 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 84 states and 122 transitions. cyclomatic complexity: 44. Second operand 5 states. Result 169 states and 231 transitions. Complement of second has 9 states. [2019-12-07 12:22:50,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-12-07 12:22:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 12:22:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 38 transitions. [2019-12-07 12:22:50,823 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 38 transitions. Stem has 2 letters. Loop has 6 letters. [2019-12-07 12:22:50,823 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:50,823 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 38 transitions. Stem has 8 letters. Loop has 6 letters. [2019-12-07 12:22:50,823 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:50,823 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 38 transitions. Stem has 2 letters. Loop has 12 letters. [2019-12-07 12:22:50,824 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:50,824 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 169 states and 231 transitions. [2019-12-07 12:22:50,826 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2019-12-07 12:22:50,827 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 169 states to 140 states and 195 transitions. [2019-12-07 12:22:50,827 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2019-12-07 12:22:50,827 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2019-12-07 12:22:50,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 195 transitions. [2019-12-07 12:22:50,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 12:22:50,828 INFO L688 BuchiCegarLoop]: Abstraction has 140 states and 195 transitions. [2019-12-07 12:22:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states and 195 transitions. [2019-12-07 12:22:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 104. [2019-12-07 12:22:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-07 12:22:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 147 transitions. [2019-12-07 12:22:50,832 INFO L711 BuchiCegarLoop]: Abstraction has 104 states and 147 transitions. [2019-12-07 12:22:50,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:22:50,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 12:22:50,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:22:50,833 INFO L87 Difference]: Start difference. First operand 104 states and 147 transitions. Second operand 3 states. [2019-12-07 12:22:50,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:50,845 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2019-12-07 12:22:50,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:22:50,845 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 64 states and 93 transitions. [2019-12-07 12:22:50,846 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2019-12-07 12:22:50,847 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 64 states to 60 states and 89 transitions. [2019-12-07 12:22:50,847 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2019-12-07 12:22:50,847 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-12-07 12:22:50,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 89 transitions. [2019-12-07 12:22:50,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 12:22:50,848 INFO L688 BuchiCegarLoop]: Abstraction has 60 states and 89 transitions. [2019-12-07 12:22:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states and 89 transitions. [2019-12-07 12:22:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-07 12:22:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 12:22:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 89 transitions. [2019-12-07 12:22:50,851 INFO L711 BuchiCegarLoop]: Abstraction has 60 states and 89 transitions. [2019-12-07 12:22:50,851 INFO L591 BuchiCegarLoop]: Abstraction has 60 states and 89 transitions. [2019-12-07 12:22:50,851 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 12:22:50,851 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 60 states and 89 transitions. [2019-12-07 12:22:50,852 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2019-12-07 12:22:50,852 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 12:22:50,852 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 12:22:50,852 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1] [2019-12-07 12:22:50,853 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2019-12-07 12:22:50,853 INFO L794 eck$LassoCheckResult]: Stem: 944#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 945#L99 assume !false; 955#L18 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 951#L24 assume 8466 == main_~s__state~0; 952#L25 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 965#L57-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 961#L99 assume !false; 960#L18 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 950#L24 assume !(8466 == main_~s__state~0); 936#L29 [2019-12-07 12:22:50,853 INFO L796 eck$LassoCheckResult]: Loop: 936#L29 assume 8512 == main_~s__state~0; 937#L30 main_~tmp___1~0 := main_#t~nondet1;havoc main_#t~nondet1; 918#L69 assume !(0 != main_~tmp___1~0);main_~s__state~0 := 8640; 920#L99 assume !false; 932#L18 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 933#L24 assume !(8466 == main_~s__state~0); 936#L29 [2019-12-07 12:22:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,853 INFO L82 PathProgramCache]: Analyzing trace with hash -775328166, now seen corresponding path program 1 times [2019-12-07 12:22:50,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:50,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905511134] [2019-12-07 12:22:50,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,861 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1593798804, now seen corresponding path program 1 times [2019-12-07 12:22:50,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:50,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415465703] [2019-12-07 12:22:50,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,867 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1200158765, now seen corresponding path program 1 times [2019-12-07 12:22:50,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:50,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756611647] [2019-12-07 12:22:50,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:50,877 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:50,893 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 12:22:50,893 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 12:22:50,893 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 12:22:50,893 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 12:22:50,894 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 12:22:50,894 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,894 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 12:22:50,894 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 12:22:50,894 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration4_Loop [2019-12-07 12:22:50,894 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 12:22:50,894 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 12:22:50,895 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 12:22:50,898 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 12:22:50,919 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 12:22:50,920 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,922 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 12:22:50,922 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,928 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 12:22:50,928 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 12:22:50,932 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 12:22:50,933 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 12:22:50,933 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 12:22:50,933 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 12:22:50,933 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 12:22:50,933 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 12:22:50,933 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,933 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 12:22:50,933 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 12:22:50,933 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration4_Loop [2019-12-07 12:22:50,933 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 12:22:50,933 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 12:22:50,934 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 12:22:50,938 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 12:22:50,960 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 12:22:50,960 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,963 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 12:22:50,964 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 12:22:50,964 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 12:22:50,964 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 12:22:50,964 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 12:22:50,964 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 12:22:50,965 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 12:22:50,965 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 12:22:50,967 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 12:22:50,969 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 12:22:50,969 INFO L444 ModelExtractionUtils]: 0 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_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 12:22:50,971 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 12:22:50,971 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 12:22:50,971 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 12:22:50,971 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8576 Supporting invariants [] [2019-12-07 12:22:50,973 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 12:22:50,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 12:22:50,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:50,988 INFO L264 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 12:22:50,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:50,998 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 12:22:50,999 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-12-07 12:22:50,999 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 60 states and 89 transitions. cyclomatic complexity: 33 Second operand 4 states. [2019-12-07 12:22:51,047 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 60 states and 89 transitions. cyclomatic complexity: 33. Second operand 4 states. Result 182 states and 280 transitions. Complement of second has 9 states. [2019-12-07 12:22:51,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-12-07 12:22:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 12:22:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2019-12-07 12:22:51,048 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 54 transitions. Stem has 9 letters. Loop has 6 letters. [2019-12-07 12:22:51,048 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:51,048 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 54 transitions. Stem has 15 letters. Loop has 6 letters. [2019-12-07 12:22:51,048 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:51,048 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 54 transitions. Stem has 9 letters. Loop has 12 letters. [2019-12-07 12:22:51,048 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 12:22:51,049 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 280 transitions. [2019-12-07 12:22:51,050 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 32 [2019-12-07 12:22:51,052 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 162 states and 244 transitions. [2019-12-07 12:22:51,052 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2019-12-07 12:22:51,052 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2019-12-07 12:22:51,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 244 transitions. [2019-12-07 12:22:51,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 12:22:51,052 INFO L688 BuchiCegarLoop]: Abstraction has 162 states and 244 transitions. [2019-12-07 12:22:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states and 244 transitions. [2019-12-07 12:22:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 124. [2019-12-07 12:22:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-07 12:22:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 182 transitions. [2019-12-07 12:22:51,057 INFO L711 BuchiCegarLoop]: Abstraction has 124 states and 182 transitions. [2019-12-07 12:22:51,057 INFO L591 BuchiCegarLoop]: Abstraction has 124 states and 182 transitions. [2019-12-07 12:22:51,057 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-12-07 12:22:51,057 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 124 states and 182 transitions. [2019-12-07 12:22:51,058 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2019-12-07 12:22:51,058 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 12:22:51,058 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 12:22:51,058 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 12:22:51,058 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:22:51,058 INFO L794 eck$LassoCheckResult]: Stem: 1262#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 1263#L99 assume !false; 1298#L18 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1299#L24 assume 8466 == main_~s__state~0; 1293#L25 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 1290#L57-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 1287#L99 assume !false; 1286#L18 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1270#L24 assume !(8466 == main_~s__state~0); 1271#L29 assume 8512 == main_~s__state~0; 1253#L30 [2019-12-07 12:22:51,058 INFO L796 eck$LassoCheckResult]: Loop: 1253#L30 main_~tmp___1~0 := main_#t~nondet1;havoc main_#t~nondet1; 1234#L69 assume 0 != main_~tmp___1~0;main_~s__state~0 := 8466; 1235#L99 assume !false; 1319#L18 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1284#L24 assume 8466 == main_~s__state~0; 1280#L25 assume !(0 == main_~blastFlag~0); 1274#L57-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 1275#L99 assume !false; 1306#L18 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1305#L24 assume !(8466 == main_~s__state~0); 1252#L29 assume 8512 == main_~s__state~0; 1253#L30 [2019-12-07 12:22:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:51,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1734630653, now seen corresponding path program 1 times [2019-12-07 12:22:51,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:51,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50445720] [2019-12-07 12:22:51,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:51,064 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1859066665, now seen corresponding path program 1 times [2019-12-07 12:22:51,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:51,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415352453] [2019-12-07 12:22:51,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:51,070 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -845557157, now seen corresponding path program 1 times [2019-12-07 12:22:51,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:22:51,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765557094] [2019-12-07 12:22:51,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:22:51,078 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:22:51,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 12:22:51 BoogieIcfgContainer [2019-12-07 12:22:51,138 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 12:22:51,138 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 12:22:51,138 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 12:22:51,138 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 12:22:51,139 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:22:49" (3/4) ... [2019-12-07 12:22:51,141 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-12-07 12:22:51,181 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a5fc3083-112a-41fe-b033-208c6893f076/bin/uautomizer/witness.graphml [2019-12-07 12:22:51,181 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 12:22:51,183 INFO L168 Benchmark]: Toolchain (without parser) took 1916.72 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 946.2 MB in the beginning and 989.5 MB in the end (delta: -43.3 MB). Peak memory consumption was 53.1 MB. Max. memory is 11.5 GB. [2019-12-07 12:22:51,183 INFO L168 Benchmark]: CDTParser took 0.13 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 12:22:51,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -146.6 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-12-07 12:22:51,184 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.31 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 12:22:51,185 INFO L168 Benchmark]: Boogie Preprocessor took 12.79 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 12:22:51,185 INFO L168 Benchmark]: RCFGBuilder took 165.31 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2019-12-07 12:22:51,185 INFO L168 Benchmark]: BuchiAutomizer took 1478.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 995.8 MB in the end (delta: 77.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 11.5 GB. [2019-12-07 12:22:51,186 INFO L168 Benchmark]: Witness Printer took 43.19 ms. Allocated memory is still 1.1 GB. Free memory was 995.8 MB in the beginning and 989.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. [2019-12-07 12:22:51,188 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 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 193.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -146.6 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.31 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.79 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 165.31 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1478.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 995.8 MB in the end (delta: 77.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 11.5 GB. * Witness Printer took 43.19 ms. Allocated memory is still 1.1 GB. Free memory was 995.8 MB in the beginning and 989.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 4 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * blastFlag + 1 and consists of 4 locations. One deterministic module has affine ranking function -1 * s__state + 8561 and consists of 4 locations. One deterministic module has affine ranking function s__state and consists of 5 locations. One deterministic module has affine ranking function -1 * s__state + 8576 and consists of 5 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 124 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.4s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 0.9s. Construction of modules took 0.1s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 101 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 124 states and ocurred in iteration 4. Nontrivial modules had stage [4, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 143 SDtfs, 145 SDslu, 114 SDs, 0 SdLazy, 176 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf97 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq191 hnf89 smp100 dnf119 smp94 tf112 neg98 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 10ms VariablesStem: 0 VariablesLoop: 1 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 0 MotzkinApplications: 4 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 29]: 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@5e07b8fc=0, \result=0, tmp___1=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@37867f93=1, s__hit=0, blastFlag=2, s__state=8512} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 29]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L9] int s__state ; [L10] int s__hit = __VERIFIER_nondet_int() ; [L11] int blastFlag ; [L12] int tmp___1; [L14] s__state = 8466 [L15] blastFlag = 0 [L17] COND TRUE 1 [L18] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L24] COND TRUE s__state == 8466 [L57] COND TRUE blastFlag == 0 [L58] blastFlag = 2 [L60] COND FALSE !(\read(s__hit)) [L63] s__state = 8512 [L17] COND TRUE 1 [L18] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L24] COND FALSE !(s__state == 8466) [L29] COND TRUE s__state == 8512 Loop: [L68] tmp___1 = __VERIFIER_nondet_int() [L69] COND TRUE \read(tmp___1) [L70] s__state = 8466 [L17] COND TRUE 1 [L18] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L24] COND TRUE s__state == 8466 [L57] COND FALSE !(blastFlag == 0) [L60] COND FALSE !(\read(s__hit)) [L63] s__state = 8512 [L17] COND TRUE 1 [L18] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L24] COND FALSE !(s__state == 8466) [L29] COND TRUE s__state == 8512 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...