./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_1a.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_1a.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 ca35bd50d888047fd624bd95d9bb19453630de07 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-a4ecdab [2020-11-30 00:15:10,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:15:10,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:15:10,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:15:10,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:15:10,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:15:10,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:15:10,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:15:10,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:15:10,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:15:10,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:15:10,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:15:10,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:15:10,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:15:10,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:15:10,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:15:10,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:15:10,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:15:10,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:15:10,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:15:10,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:15:10,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:15:10,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:15:10,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:15:10,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:15:10,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:15:10,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:15:10,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:15:10,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:15:10,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:15:10,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:15:10,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:15:10,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:15:10,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:15:10,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:15:10,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:15:10,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:15:10,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:15:10,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:15:10,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:15:10,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:15:10,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-30 00:15:10,979 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:15:10,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:15:10,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:15:10,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:15:10,982 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:15:10,982 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-30 00:15:10,982 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-30 00:15:10,983 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-30 00:15:10,983 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-30 00:15:10,983 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-30 00:15:10,984 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-30 00:15:10,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:15:10,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:15:10,985 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:15:10,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:15:10,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:15:10,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:15:10,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-30 00:15:10,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-30 00:15:10,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-30 00:15:10,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:15:10,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:15:10,987 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-30 00:15:10,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:15:10,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-30 00:15:10,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:15:10,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:15:10,988 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-30 00:15:10,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:15:10,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:15:10,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:15:10,989 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-30 00:15:10,991 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-30 00:15:10,991 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca35bd50d888047fd624bd95d9bb19453630de07 [2020-11-30 00:15:11,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:15:11,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:15:11,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:15:11,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:15:11,305 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:15:11,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/../../sv-benchmarks/c/openssl-simplified/s3_srvr_1a.cil.c [2020-11-30 00:15:11,398 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/data/24895d74c/1dfae736581a4b9e87dacbc1bd498ee4/FLAGdf4201623 [2020-11-30 00:15:11,924 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:15:11,925 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/sv-benchmarks/c/openssl-simplified/s3_srvr_1a.cil.c [2020-11-30 00:15:11,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/data/24895d74c/1dfae736581a4b9e87dacbc1bd498ee4/FLAGdf4201623 [2020-11-30 00:15:12,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/data/24895d74c/1dfae736581a4b9e87dacbc1bd498ee4 [2020-11-30 00:15:12,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:15:12,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:15:12,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:15:12,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:15:12,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:15:12,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20bf90df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12, skipping insertion in model container [2020-11-30 00:15:12,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:15:12,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:15:12,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:15:12,535 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:15:12,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:15:12,576 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:15:12,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12 WrapperNode [2020-11-30 00:15:12,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:15:12,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:15:12,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:15:12,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:15:12,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:15:12,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:15:12,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:15:12,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:15:12,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... [2020-11-30 00:15:12,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:15:12,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:15:12,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:15:12,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:15:12,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:12,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:15:12,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:15:12,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:15:12,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:15:13,096 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:15:13,096 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-30 00:15:13,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:15:13 BoogieIcfgContainer [2020-11-30 00:15:13,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:15:13,100 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-30 00:15:13,100 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-30 00:15:13,106 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-30 00:15:13,106 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:15:13,107 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 30.11 12:15:12" (1/3) ... [2020-11-30 00:15:13,108 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@241dcfb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:15:13, skipping insertion in model container [2020-11-30 00:15:13,109 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:15:13,109 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:12" (2/3) ... [2020-11-30 00:15:13,109 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@241dcfb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:15:13, skipping insertion in model container [2020-11-30 00:15:13,109 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:15:13,110 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:15:13" (3/3) ... [2020-11-30 00:15:13,111 INFO L373 chiAutomizerObserver]: Analyzing ICFG s3_srvr_1a.cil.c [2020-11-30 00:15:13,158 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-30 00:15:13,158 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-30 00:15:13,159 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-30 00:15:13,159 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:15:13,159 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:15:13,159 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-30 00:15:13,159 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:15:13,160 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-30 00:15:13,175 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 46 states. [2020-11-30 00:15:13,196 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 38 [2020-11-30 00:15:13,197 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:13,197 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:13,205 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-30 00:15:13,205 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-30 00:15:13,207 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-30 00:15:13,207 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 46 states. [2020-11-30 00:15:13,211 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 38 [2020-11-30 00:15:13,212 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:13,212 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:13,213 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-30 00:15:13,214 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-30 00:15:13,221 INFO L794 eck$LassoCheckResult]: Stem: 41#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13#L-1true havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 35#L178true [2020-11-30 00:15:13,222 INFO L796 eck$LassoCheckResult]: Loop: 35#L178true assume !false; 30#L25true assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 39#L31true assume 8466 == main_~s__state~0; 17#L32true assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 4#L80-1true main_~s__state~0 := 8496; 35#L178true [2020-11-30 00:15:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:13,236 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-30 00:15:13,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:13,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727732271] [2020-11-30 00:15:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:13,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:13,381 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:13,402 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash 39285361, now seen corresponding path program 1 times [2020-11-30 00:15:13,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:13,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169356212] [2020-11-30 00:15:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:13,417 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:13,427 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:13,431 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:13,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1810724847, now seen corresponding path program 1 times [2020-11-30 00:15:13,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:13,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694443772] [2020-11-30 00:15:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:13,453 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:13,480 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:13,486 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:13,605 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:13,606 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:13,606 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:13,606 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:13,607 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:13,607 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:13,607 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:13,607 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:13,608 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration1_Loop [2020-11-30 00:15:13,633 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:13,634 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:13,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:13,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:13,802 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:13,803 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:13,812 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:13,812 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:13,865 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:13,866 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:13,877 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:13,914 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:13,914 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:13,914 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:13,914 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:13,915 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:13,915 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:13,915 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:13,915 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:13,915 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration1_Loop [2020-11-30 00:15:13,915 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:13,915 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:13,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:13,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:13,990 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:13,995 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:14,003 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 [2020-11-30 00:15:14,006 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:14,006 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:14,007 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:14,007 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:14,007 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:14,012 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:14,012 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:14,016 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:14,025 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:14,025 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:14,066 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:14,066 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:14,067 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:14,068 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8481 Supporting invariants [] Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:14,107 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:14,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:14,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:14,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:14,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:14,286 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 [2020-11-30 00:15:14,296 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 46 states. Second operand 4 states. [2020-11-30 00:15:14,608 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 46 states.. Second operand 4 states. Result 137 states and 207 transitions. Complement of second has 8 states. [2020-11-30 00:15:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:15:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2020-11-30 00:15:14,613 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 62 transitions. Stem has 2 letters. Loop has 5 letters. [2020-11-30 00:15:14,614 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:14,614 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 62 transitions. Stem has 7 letters. Loop has 5 letters. [2020-11-30 00:15:14,614 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:14,614 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 62 transitions. Stem has 2 letters. Loop has 10 letters. [2020-11-30 00:15:14,615 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:14,616 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 137 states and 207 transitions. [2020-11-30 00:15:14,625 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 38 [2020-11-30 00:15:14,630 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 137 states to 81 states and 128 transitions. [2020-11-30 00:15:14,631 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2020-11-30 00:15:14,632 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2020-11-30 00:15:14,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 128 transitions. [2020-11-30 00:15:14,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:14,634 INFO L691 BuchiCegarLoop]: Abstraction has 81 states and 128 transitions. [2020-11-30 00:15:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states and 128 transitions. [2020-11-30 00:15:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2020-11-30 00:15:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 00:15:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 74 transitions. [2020-11-30 00:15:14,666 INFO L714 BuchiCegarLoop]: Abstraction has 48 states and 74 transitions. [2020-11-30 00:15:14,666 INFO L594 BuchiCegarLoop]: Abstraction has 48 states and 74 transitions. [2020-11-30 00:15:14,666 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-30 00:15:14,666 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 48 states and 74 transitions. [2020-11-30 00:15:14,668 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 38 [2020-11-30 00:15:14,668 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:14,668 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:14,668 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-11-30 00:15:14,669 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-30 00:15:14,669 INFO L794 eck$LassoCheckResult]: Stem: 278#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 252#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 253#L178 assume !false; 269#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 270#L31 assume !(8466 == main_~s__state~0); 265#L34 [2020-11-30 00:15:14,669 INFO L796 eck$LassoCheckResult]: Loop: 265#L34 assume 8496 == main_~s__state~0; 266#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 264#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 234#L178 assume !false; 274#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 280#L31 assume !(8466 == main_~s__state~0); 265#L34 [2020-11-30 00:15:14,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:14,670 INFO L82 PathProgramCache]: Analyzing trace with hash 28699821, now seen corresponding path program 1 times [2020-11-30 00:15:14,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:14,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278741015] [2020-11-30 00:15:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:14,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278741015] [2020-11-30 00:15:14,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:14,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:15:14,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756835796] [2020-11-30 00:15:14,728 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:15:14,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:14,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1658744177, now seen corresponding path program 1 times [2020-11-30 00:15:14,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:14,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357897052] [2020-11-30 00:15:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:14,735 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:14,739 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:14,741 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:14,776 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:14,776 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:14,777 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:14,777 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:14,777 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:14,777 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:14,777 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:14,777 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:14,777 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration2_Loop [2020-11-30 00:15:14,777 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:14,778 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:14,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:14,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:14,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:14,843 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:14,844 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:14,851 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:14,851 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:14,855 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:15:14,856 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~s__hit~0=0} Honda state: {ULTIMATE.start_main_~s__hit~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:14,901 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:14,902 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:14,949 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:14,949 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:14,955 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:14,991 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:14,991 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:14,991 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:14,991 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:14,991 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:14,991 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:14,992 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:14,992 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:14,992 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration2_Loop [2020-11-30 00:15:14,992 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:14,992 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:14,994 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:14,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:15,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:15,109 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:15,109 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:15,114 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 [2020-11-30 00:15:15,117 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:15,117 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:15,117 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:15,118 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:15,118 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:15,120 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:15,120 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:15,123 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:15,167 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 [2020-11-30 00:15:15,169 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:15,170 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:15,170 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:15,170 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:15,170 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:15,173 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:15,173 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:15,206 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:15,210 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:15,210 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:15,217 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:15,217 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:15,218 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:15,218 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8504 Supporting invariants [] [2020-11-30 00:15:15,254 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:15,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:15,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:15,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:15,360 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 [2020-11-30 00:15:15,361 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 48 states and 74 transitions. cyclomatic complexity: 28 Second operand 4 states. [2020-11-30 00:15:15,668 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 48 states and 74 transitions. cyclomatic complexity: 28. Second operand 4 states. Result 171 states and 259 transitions. Complement of second has 7 states. [2020-11-30 00:15:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:15:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2020-11-30 00:15:15,671 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 91 transitions. Stem has 5 letters. Loop has 6 letters. [2020-11-30 00:15:15,672 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:15,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 91 transitions. Stem has 11 letters. Loop has 6 letters. [2020-11-30 00:15:15,672 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:15,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 91 transitions. Stem has 5 letters. Loop has 12 letters. [2020-11-30 00:15:15,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:15,673 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 171 states and 259 transitions. [2020-11-30 00:15:15,682 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 43 [2020-11-30 00:15:15,686 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 171 states to 127 states and 197 transitions. [2020-11-30 00:15:15,686 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2020-11-30 00:15:15,688 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2020-11-30 00:15:15,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 197 transitions. [2020-11-30 00:15:15,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:15,690 INFO L691 BuchiCegarLoop]: Abstraction has 127 states and 197 transitions. [2020-11-30 00:15:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 197 transitions. [2020-11-30 00:15:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 69. [2020-11-30 00:15:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-30 00:15:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 105 transitions. [2020-11-30 00:15:15,701 INFO L714 BuchiCegarLoop]: Abstraction has 69 states and 105 transitions. [2020-11-30 00:15:15,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:15,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:15,708 INFO L87 Difference]: Start difference. First operand 69 states and 105 transitions. Second operand 3 states. [2020-11-30 00:15:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:15,804 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2020-11-30 00:15:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:15,805 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 76 states and 111 transitions. [2020-11-30 00:15:15,807 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 46 [2020-11-30 00:15:15,808 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 76 states to 74 states and 109 transitions. [2020-11-30 00:15:15,808 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2020-11-30 00:15:15,809 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2020-11-30 00:15:15,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 109 transitions. [2020-11-30 00:15:15,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:15,809 INFO L691 BuchiCegarLoop]: Abstraction has 74 states and 109 transitions. [2020-11-30 00:15:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states and 109 transitions. [2020-11-30 00:15:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-11-30 00:15:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-30 00:15:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 107 transitions. [2020-11-30 00:15:15,815 INFO L714 BuchiCegarLoop]: Abstraction has 72 states and 107 transitions. [2020-11-30 00:15:15,815 INFO L594 BuchiCegarLoop]: Abstraction has 72 states and 107 transitions. [2020-11-30 00:15:15,815 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-30 00:15:15,815 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 72 states and 107 transitions. [2020-11-30 00:15:15,816 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 46 [2020-11-30 00:15:15,816 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:15,817 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:15,817 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:15,817 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-30 00:15:15,818 INFO L794 eck$LassoCheckResult]: Stem: 709#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 676#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 677#L178 assume !false; 698#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 699#L31 assume 8466 == main_~s__state~0; 722#L32 assume !(0 == main_~blastFlag~0); 721#L80-1 main_~s__state~0 := 8496; 720#L178 assume !false; 719#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 704#L31 assume !(8466 == main_~s__state~0); 705#L34 assume !(8496 == main_~s__state~0); 666#L38 [2020-11-30 00:15:15,818 INFO L796 eck$LassoCheckResult]: Loop: 666#L38 assume 8512 == main_~s__state~0; 667#L39 main_~s__state~0 := 8528; 660#L178 assume !false; 715#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 713#L31 assume !(8466 == main_~s__state~0); 712#L34 assume !(8496 == main_~s__state~0); 666#L38 [2020-11-30 00:15:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:15,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1257298039, now seen corresponding path program 1 times [2020-11-30 00:15:15,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:15,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492185793] [2020-11-30 00:15:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:15,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492185793] [2020-11-30 00:15:15,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:15,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:15,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940329119] [2020-11-30 00:15:15,882 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:15:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:15,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1809521393, now seen corresponding path program 1 times [2020-11-30 00:15:15,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:15,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653145355] [2020-11-30 00:15:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:15,886 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:15,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:15,901 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:15,924 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:15,925 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:15,925 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:15,925 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:15,925 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:15,925 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:15,925 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:15,925 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:15,926 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration3_Loop [2020-11-30 00:15:15,926 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:15,926 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:15,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:15,995 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:15,995 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:15,997 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:15,998 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:16,049 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:16,049 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:16,057 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:16,092 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:16,092 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:16,092 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:16,092 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:16,092 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:16,092 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:16,093 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:16,093 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:16,093 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration3_Loop [2020-11-30 00:15:16,093 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:16,093 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:16,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:16,125 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:16,125 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:16,136 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 [2020-11-30 00:15:16,137 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:16,138 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:16,138 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:16,138 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:16,138 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:16,140 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:16,141 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:16,144 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:16,148 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:16,148 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:16,155 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:16,156 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:16,156 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:16,157 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8520 Supporting invariants [] [2020-11-30 00:15:16,181 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:16,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:16,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:16,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:16,270 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 [2020-11-30 00:15:16,270 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 72 states and 107 transitions. cyclomatic complexity: 39 Second operand 4 states. [2020-11-30 00:15:16,562 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 72 states and 107 transitions. cyclomatic complexity: 39. Second operand 4 states. Result 230 states and 345 transitions. Complement of second has 9 states. [2020-11-30 00:15:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:15:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2020-11-30 00:15:16,564 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 130 transitions. Stem has 11 letters. Loop has 6 letters. [2020-11-30 00:15:16,564 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:16,564 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 130 transitions. Stem has 17 letters. Loop has 6 letters. [2020-11-30 00:15:16,565 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:16,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 130 transitions. Stem has 11 letters. Loop has 12 letters. [2020-11-30 00:15:16,565 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:16,565 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 230 states and 345 transitions. [2020-11-30 00:15:16,569 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2020-11-30 00:15:16,576 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 230 states to 180 states and 279 transitions. [2020-11-30 00:15:16,577 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-11-30 00:15:16,578 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2020-11-30 00:15:16,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 279 transitions. [2020-11-30 00:15:16,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:16,579 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 279 transitions. [2020-11-30 00:15:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 279 transitions. [2020-11-30 00:15:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 100. [2020-11-30 00:15:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-30 00:15:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 150 transitions. [2020-11-30 00:15:16,597 INFO L714 BuchiCegarLoop]: Abstraction has 100 states and 150 transitions. [2020-11-30 00:15:16,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:16,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:16,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:16,599 INFO L87 Difference]: Start difference. First operand 100 states and 150 transitions. Second operand 3 states. [2020-11-30 00:15:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:16,634 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2020-11-30 00:15:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:16,635 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 103 states and 153 transitions. [2020-11-30 00:15:16,636 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-30 00:15:16,643 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 103 states to 103 states and 153 transitions. [2020-11-30 00:15:16,643 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2020-11-30 00:15:16,643 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2020-11-30 00:15:16,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 153 transitions. [2020-11-30 00:15:16,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:16,644 INFO L691 BuchiCegarLoop]: Abstraction has 103 states and 153 transitions. [2020-11-30 00:15:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states and 153 transitions. [2020-11-30 00:15:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-11-30 00:15:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-30 00:15:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 153 transitions. [2020-11-30 00:15:16,670 INFO L714 BuchiCegarLoop]: Abstraction has 103 states and 153 transitions. [2020-11-30 00:15:16,670 INFO L594 BuchiCegarLoop]: Abstraction has 103 states and 153 transitions. [2020-11-30 00:15:16,670 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-30 00:15:16,670 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 103 states and 153 transitions. [2020-11-30 00:15:16,671 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-30 00:15:16,681 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:16,681 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:16,683 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:16,683 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:16,684 INFO L794 eck$LassoCheckResult]: Stem: 1293#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1261#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 1262#L178 assume !false; 1330#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1329#L31 assume 8466 == main_~s__state~0; 1326#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 1325#L80-1 main_~s__state~0 := 8496; 1323#L178 assume !false; 1322#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1321#L31 assume !(8466 == main_~s__state~0); 1320#L34 assume !(8496 == main_~s__state~0); 1296#L38 assume !(8512 == main_~s__state~0); 1251#L42 [2020-11-30 00:15:16,684 INFO L796 eck$LassoCheckResult]: Loop: 1251#L42 assume 8528 == main_~s__state~0; 1268#L43 main_~s__state~0 := 8544; 1244#L178 assume !false; 1306#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1302#L31 assume !(8466 == main_~s__state~0); 1297#L34 assume !(8496 == main_~s__state~0); 1295#L38 assume !(8512 == main_~s__state~0); 1251#L42 [2020-11-30 00:15:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1453473786, now seen corresponding path program 1 times [2020-11-30 00:15:16,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:16,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40703552] [2020-11-30 00:15:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:16,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40703552] [2020-11-30 00:15:16,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:16,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:16,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308095424] [2020-11-30 00:15:16,736 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:15:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:16,736 INFO L82 PathProgramCache]: Analyzing trace with hash 460397777, now seen corresponding path program 1 times [2020-11-30 00:15:16,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:16,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694706622] [2020-11-30 00:15:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:16,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:16,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:16,747 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:16,773 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:16,773 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:16,773 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:16,773 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:16,773 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:16,773 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:16,774 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:16,774 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:16,774 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration4_Loop [2020-11-30 00:15:16,774 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:16,774 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:16,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:16,807 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:16,807 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:16,810 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:16,810 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:16,862 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:16,862 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:16,867 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:16,902 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:16,902 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:16,903 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:16,903 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:16,903 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:16,903 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:16,903 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:16,903 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:16,903 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration4_Loop [2020-11-30 00:15:16,903 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:16,904 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:16,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:16,933 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:16,934 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:16,937 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 [2020-11-30 00:15:16,939 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:16,939 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:16,939 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:16,939 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:16,939 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:16,941 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:16,941 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:16,944 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:16,947 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:16,947 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:16,950 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:16,950 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:16,950 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:16,950 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8536 Supporting invariants [] Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:16,987 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:17,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:17,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:17,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:17,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:17,074 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 [2020-11-30 00:15:17,074 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 103 states and 153 transitions. cyclomatic complexity: 56 Second operand 4 states. [2020-11-30 00:15:17,392 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 103 states and 153 transitions. cyclomatic complexity: 56. Second operand 4 states. Result 262 states and 395 transitions. Complement of second has 9 states. [2020-11-30 00:15:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:15:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2020-11-30 00:15:17,394 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 135 transitions. Stem has 12 letters. Loop has 7 letters. [2020-11-30 00:15:17,394 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:17,395 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 135 transitions. Stem has 19 letters. Loop has 7 letters. [2020-11-30 00:15:17,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:17,395 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 135 transitions. Stem has 12 letters. Loop has 14 letters. [2020-11-30 00:15:17,396 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:17,396 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 262 states and 395 transitions. [2020-11-30 00:15:17,399 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 74 [2020-11-30 00:15:17,407 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 262 states to 216 states and 333 transitions. [2020-11-30 00:15:17,408 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 119 [2020-11-30 00:15:17,408 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 152 [2020-11-30 00:15:17,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 216 states and 333 transitions. [2020-11-30 00:15:17,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:17,409 INFO L691 BuchiCegarLoop]: Abstraction has 216 states and 333 transitions. [2020-11-30 00:15:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states and 333 transitions. [2020-11-30 00:15:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 137. [2020-11-30 00:15:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-30 00:15:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 206 transitions. [2020-11-30 00:15:17,419 INFO L714 BuchiCegarLoop]: Abstraction has 137 states and 206 transitions. [2020-11-30 00:15:17,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:17,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:17,420 INFO L87 Difference]: Start difference. First operand 137 states and 206 transitions. Second operand 3 states. [2020-11-30 00:15:17,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:17,495 INFO L93 Difference]: Finished difference Result 156 states and 219 transitions. [2020-11-30 00:15:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:17,496 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 156 states and 219 transitions. [2020-11-30 00:15:17,497 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 71 [2020-11-30 00:15:17,498 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 156 states to 149 states and 211 transitions. [2020-11-30 00:15:17,498 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 91 [2020-11-30 00:15:17,498 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 96 [2020-11-30 00:15:17,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 211 transitions. [2020-11-30 00:15:17,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:17,499 INFO L691 BuchiCegarLoop]: Abstraction has 149 states and 211 transitions. [2020-11-30 00:15:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states and 211 transitions. [2020-11-30 00:15:17,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2020-11-30 00:15:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-11-30 00:15:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 209 transitions. [2020-11-30 00:15:17,503 INFO L714 BuchiCegarLoop]: Abstraction has 147 states and 209 transitions. [2020-11-30 00:15:17,504 INFO L594 BuchiCegarLoop]: Abstraction has 147 states and 209 transitions. [2020-11-30 00:15:17,504 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-30 00:15:17,504 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 147 states and 209 transitions. [2020-11-30 00:15:17,505 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 70 [2020-11-30 00:15:17,505 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:17,505 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:17,506 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:17,506 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:17,506 INFO L794 eck$LassoCheckResult]: Stem: 2041#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2004#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 2005#L178 assume !false; 2029#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2030#L31 assume 8466 == main_~s__state~0; 2009#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 2010#L80-1 main_~s__state~0 := 8496; 2118#L178 assume !false; 2116#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2105#L31 assume !(8466 == main_~s__state~0); 2104#L34 assume 8496 == main_~s__state~0; 2026#L35 assume !(1 == main_~blastFlag~0); 2019#L87-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 2020#L178 assume !false; 2108#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2106#L31 assume !(8466 == main_~s__state~0); 2023#L34 assume !(8496 == main_~s__state~0); 2024#L38 assume !(8512 == main_~s__state~0); 2052#L42 assume !(8528 == main_~s__state~0); 2039#L46 [2020-11-30 00:15:17,507 INFO L796 eck$LassoCheckResult]: Loop: 2039#L46 assume 8544 == main_~s__state~0; 1986#L47 assume !(0 != 1 + main_~s__verify_mode~0);main_~s__state~0 := 8560; 1987#L178 assume !false; 2051#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2049#L31 assume !(8466 == main_~s__state~0); 2047#L34 assume !(8496 == main_~s__state~0); 2045#L38 assume !(8512 == main_~s__state~0); 2044#L42 assume !(8528 == main_~s__state~0); 2039#L46 [2020-11-30 00:15:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash 495468714, now seen corresponding path program 1 times [2020-11-30 00:15:17,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:17,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716210370] [2020-11-30 00:15:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:17,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716210370] [2020-11-30 00:15:17,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:17,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:17,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975479140] [2020-11-30 00:15:17,561 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:15:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:17,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1040610643, now seen corresponding path program 1 times [2020-11-30 00:15:17,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:17,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82389373] [2020-11-30 00:15:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:17,566 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:17,569 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:17,570 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:17,626 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:17,626 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:17,626 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:17,626 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:17,626 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:17,626 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:17,626 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:17,626 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:17,627 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration5_Loop [2020-11-30 00:15:17,627 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:17,627 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:17,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:17,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:17,686 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:17,686 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:17,696 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:17,696 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:15:17,700 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:15:17,700 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~s__verify_mode~0=-1} Honda state: {ULTIMATE.start_main_~s__verify_mode~0=-1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:17,733 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:17,733 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:17,763 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:17,763 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:15:17,773 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:17,810 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:17,811 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:17,811 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:17,811 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:17,811 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:17,811 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:17,811 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:17,811 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:17,811 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration5_Loop [2020-11-30 00:15:17,811 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:17,811 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:17,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:17,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:17,861 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:17,861 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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) [2020-11-30 00:15:17,882 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 [2020-11-30 00:15:17,884 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:17,884 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:17,885 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:17,885 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:17,885 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:17,886 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:17,886 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:17,889 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:17,924 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 [2020-11-30 00:15:17,925 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:17,925 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:17,926 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:17,926 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:17,926 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:17,927 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:17,927 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:15:17,929 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:17,939 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:17,939 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/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 [2020-11-30 00:15:17,942 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:17,942 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:17,942 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:17,942 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8552 Supporting invariants [] [2020-11-30 00:15:17,963 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:18,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:18,045 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 [2020-11-30 00:15:18,045 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 147 states and 209 transitions. cyclomatic complexity: 68 Second operand 4 states. [2020-11-30 00:15:18,335 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 147 states and 209 transitions. cyclomatic complexity: 68. Second operand 4 states. Result 314 states and 460 transitions. Complement of second has 9 states. [2020-11-30 00:15:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:15:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2020-11-30 00:15:18,336 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 142 transitions. Stem has 19 letters. Loop has 8 letters. [2020-11-30 00:15:18,337 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:18,337 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 142 transitions. Stem has 27 letters. Loop has 8 letters. [2020-11-30 00:15:18,337 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:18,337 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 142 transitions. Stem has 19 letters. Loop has 16 letters. [2020-11-30 00:15:18,338 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:18,338 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 314 states and 460 transitions. [2020-11-30 00:15:18,342 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 98 [2020-11-30 00:15:18,344 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 314 states to 272 states and 402 transitions. [2020-11-30 00:15:18,345 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 148 [2020-11-30 00:15:18,345 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 177 [2020-11-30 00:15:18,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 272 states and 402 transitions. [2020-11-30 00:15:18,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:18,346 INFO L691 BuchiCegarLoop]: Abstraction has 272 states and 402 transitions. [2020-11-30 00:15:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states and 402 transitions. [2020-11-30 00:15:18,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 200. [2020-11-30 00:15:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-30 00:15:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 290 transitions. [2020-11-30 00:15:18,352 INFO L714 BuchiCegarLoop]: Abstraction has 200 states and 290 transitions. [2020-11-30 00:15:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:18,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:18,353 INFO L87 Difference]: Start difference. First operand 200 states and 290 transitions. Second operand 3 states. [2020-11-30 00:15:18,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:18,380 INFO L93 Difference]: Finished difference Result 248 states and 338 transitions. [2020-11-30 00:15:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:18,381 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 248 states and 338 transitions. [2020-11-30 00:15:18,383 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 110 [2020-11-30 00:15:18,386 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 248 states to 248 states and 338 transitions. [2020-11-30 00:15:18,386 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 142 [2020-11-30 00:15:18,387 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 142 [2020-11-30 00:15:18,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 248 states and 338 transitions. [2020-11-30 00:15:18,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:18,387 INFO L691 BuchiCegarLoop]: Abstraction has 248 states and 338 transitions. [2020-11-30 00:15:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states and 338 transitions. [2020-11-30 00:15:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2020-11-30 00:15:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-11-30 00:15:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 338 transitions. [2020-11-30 00:15:18,394 INFO L714 BuchiCegarLoop]: Abstraction has 248 states and 338 transitions. [2020-11-30 00:15:18,394 INFO L594 BuchiCegarLoop]: Abstraction has 248 states and 338 transitions. [2020-11-30 00:15:18,395 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-30 00:15:18,395 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 248 states and 338 transitions. [2020-11-30 00:15:18,396 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 110 [2020-11-30 00:15:18,397 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:18,397 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:18,399 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:18,400 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:18,400 INFO L794 eck$LassoCheckResult]: Stem: 3067#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3027#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 3028#L178 assume !false; 3177#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3175#L31 assume 8466 == main_~s__state~0; 3173#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 3172#L80-1 main_~s__state~0 := 8496; 3171#L178 assume !false; 3168#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3165#L31 assume !(8466 == main_~s__state~0); 3163#L34 assume 8496 == main_~s__state~0; 3157#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 3155#L87-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 3152#L178 assume !false; 3150#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3149#L31 assume !(8466 == main_~s__state~0); 3148#L34 assume !(8496 == main_~s__state~0); 3147#L38 assume !(8512 == main_~s__state~0); 3108#L42 assume !(8528 == main_~s__state~0); 3074#L46 assume !(8544 == main_~s__state~0); 3061#L50 [2020-11-30 00:15:18,400 INFO L796 eck$LassoCheckResult]: Loop: 3061#L50 assume 8560 == main_~s__state~0; 3022#L51 main_~s__state~0 := 8576; 3005#L178 assume !false; 3088#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3084#L31 assume !(8466 == main_~s__state~0); 3080#L34 assume !(8496 == main_~s__state~0); 3075#L38 assume !(8512 == main_~s__state~0); 3072#L42 assume !(8528 == main_~s__state~0); 3071#L46 assume !(8544 == main_~s__state~0); 3061#L50 [2020-11-30 00:15:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:18,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1794569917, now seen corresponding path program 1 times [2020-11-30 00:15:18,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:18,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026307506] [2020-11-30 00:15:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:18,428 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:18,439 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:18,444 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1708032834, now seen corresponding path program 1 times [2020-11-30 00:15:18,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:18,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271632715] [2020-11-30 00:15:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:18,449 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:18,452 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:18,454 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash 480139650, now seen corresponding path program 1 times [2020-11-30 00:15:18,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:18,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495946285] [2020-11-30 00:15:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 00:15:18,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495946285] [2020-11-30 00:15:18,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:18,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:18,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024906621] [2020-11-30 00:15:18,536 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:18,536 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:18,536 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:18,536 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:18,536 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:18,537 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:18,537 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:18,537 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:18,537 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration6_Loop [2020-11-30 00:15:18,537 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:18,537 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:18,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:18,568 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:18,568 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:18,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:18,572 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:18,619 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:18,619 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:18,626 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:18,664 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:18,665 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:18,665 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:18,665 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:18,665 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:18,665 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:18,665 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:18,665 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:18,665 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration6_Loop [2020-11-30 00:15:18,665 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:18,666 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:18,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:18,699 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:18,700 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:18,703 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 [2020-11-30 00:15:18,705 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:18,705 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:18,705 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:18,705 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:18,705 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:18,708 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:18,708 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:18,713 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:18,718 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:18,718 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:18,722 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:18,723 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:18,723 INFO L510 LassoAnalysis]: Proved termination. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:18,723 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8568 Supporting invariants [] [2020-11-30 00:15:18,745 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:18,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:18,866 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 [2020-11-30 00:15:18,866 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 248 states and 338 transitions. cyclomatic complexity: 98 Second operand 4 states. [2020-11-30 00:15:19,184 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 248 states and 338 transitions. cyclomatic complexity: 98. Second operand 4 states. Result 440 states and 627 transitions. Complement of second has 9 states. [2020-11-30 00:15:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:15:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2020-11-30 00:15:19,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 167 transitions. Stem has 20 letters. Loop has 9 letters. [2020-11-30 00:15:19,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:19,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 167 transitions. Stem has 29 letters. Loop has 9 letters. [2020-11-30 00:15:19,187 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:19,187 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 167 transitions. Stem has 20 letters. Loop has 18 letters. [2020-11-30 00:15:19,187 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:19,187 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 440 states and 627 transitions. [2020-11-30 00:15:19,192 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 157 [2020-11-30 00:15:19,196 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 440 states to 405 states and 577 transitions. [2020-11-30 00:15:19,197 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-11-30 00:15:19,198 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2020-11-30 00:15:19,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 405 states and 577 transitions. [2020-11-30 00:15:19,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:19,199 INFO L691 BuchiCegarLoop]: Abstraction has 405 states and 577 transitions. [2020-11-30 00:15:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states and 577 transitions. [2020-11-30 00:15:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 323. [2020-11-30 00:15:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-11-30 00:15:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 448 transitions. [2020-11-30 00:15:19,210 INFO L714 BuchiCegarLoop]: Abstraction has 323 states and 448 transitions. [2020-11-30 00:15:19,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:19,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:19,212 INFO L87 Difference]: Start difference. First operand 323 states and 448 transitions. Second operand 3 states. [2020-11-30 00:15:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:19,323 INFO L93 Difference]: Finished difference Result 396 states and 522 transitions. [2020-11-30 00:15:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:19,324 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 396 states and 522 transitions. [2020-11-30 00:15:19,327 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 152 [2020-11-30 00:15:19,331 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 396 states to 371 states and 497 transitions. [2020-11-30 00:15:19,331 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2020-11-30 00:15:19,332 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-11-30 00:15:19,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 371 states and 497 transitions. [2020-11-30 00:15:19,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:19,332 INFO L691 BuchiCegarLoop]: Abstraction has 371 states and 497 transitions. [2020-11-30 00:15:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states and 497 transitions. [2020-11-30 00:15:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 335. [2020-11-30 00:15:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-11-30 00:15:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 460 transitions. [2020-11-30 00:15:19,340 INFO L714 BuchiCegarLoop]: Abstraction has 335 states and 460 transitions. [2020-11-30 00:15:19,340 INFO L594 BuchiCegarLoop]: Abstraction has 335 states and 460 transitions. [2020-11-30 00:15:19,340 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-30 00:15:19,341 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 335 states and 460 transitions. [2020-11-30 00:15:19,343 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 150 [2020-11-30 00:15:19,343 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:19,343 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:19,346 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:19,346 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:19,346 INFO L794 eck$LassoCheckResult]: Stem: 4599#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4551#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 4552#L178 assume !false; 4796#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 4794#L31 assume 8466 == main_~s__state~0; 4793#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 4791#L80-1 main_~s__state~0 := 8496; 4789#L178 assume !false; 4785#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 4784#L31 assume !(8466 == main_~s__state~0); 4783#L34 assume 8496 == main_~s__state~0; 4578#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 4572#L87-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 4574#L178 [2020-11-30 00:15:19,346 INFO L796 eck$LassoCheckResult]: Loop: 4574#L178 assume !false; 4581#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 4582#L31 assume !(8466 == main_~s__state~0); 4576#L34 assume !(8496 == main_~s__state~0); 4540#L38 assume !(8512 == main_~s__state~0); 4541#L42 assume !(8528 == main_~s__state~0); 4597#L46 assume !(8544 == main_~s__state~0); 4604#L50 assume !(8560 == main_~s__state~0); 4575#L54 assume !(8576 == main_~s__state~0); 4534#L58 assume !(8592 == main_~s__state~0); 4535#L62 assume !(8608 == main_~s__state~0); 4548#L66 assume !(8640 == main_~s__state~0); 4586#L70 assume 8656 == main_~s__state~0; 4544#L71 assume 2 == main_~blastFlag~0;main_~blastFlag~0 := 3; 4545#L164-1 main_~s__state~0 := 8672; 4574#L178 [2020-11-30 00:15:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:19,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2108014467, now seen corresponding path program 1 times [2020-11-30 00:15:19,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:19,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321411844] [2020-11-30 00:15:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:19,372 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:19,390 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:19,394 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:19,398 INFO L82 PathProgramCache]: Analyzing trace with hash -318790614, now seen corresponding path program 1 times [2020-11-30 00:15:19,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:19,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447426574] [2020-11-30 00:15:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:19,413 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:19,423 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:19,425 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:19,426 INFO L82 PathProgramCache]: Analyzing trace with hash -444277714, now seen corresponding path program 1 times [2020-11-30 00:15:19,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:19,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172390904] [2020-11-30 00:15:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:19,436 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:19,462 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:19,478 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:19,541 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:19,541 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:19,542 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:19,542 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:19,542 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:19,542 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:19,542 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:19,542 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:19,542 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration7_Loop [2020-11-30 00:15:19,542 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:19,543 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:19,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:19,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:19,605 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:19,605 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:19,612 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:19,612 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:19,663 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:19,663 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:19,690 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:19,729 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:19,730 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:19,730 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:19,730 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:19,730 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:19,730 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:19,730 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:19,730 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:19,730 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration7_Loop [2020-11-30 00:15:19,731 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:19,731 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:19,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:19,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:19,798 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:19,798 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:19,802 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 [2020-11-30 00:15:19,804 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:19,804 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:19,805 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:19,805 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:19,805 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:19,806 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:19,807 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:19,810 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:19,813 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:19,814 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:19,817 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:19,817 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:19,817 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:19,817 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~blastFlag~0) = -2*ULTIMATE.start_main_~blastFlag~0 + 5 Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:19,854 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:19,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:19,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:19,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:19,969 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 [2020-11-30 00:15:19,969 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 335 states and 460 transitions. cyclomatic complexity: 135 Second operand 4 states. [2020-11-30 00:15:20,018 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 335 states and 460 transitions. cyclomatic complexity: 135. Second operand 4 states. Result 466 states and 639 transitions. Complement of second has 4 states. [2020-11-30 00:15:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:15:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2020-11-30 00:15:20,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 129 transitions. Stem has 13 letters. Loop has 15 letters. [2020-11-30 00:15:20,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:20,020 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 129 transitions. Stem has 28 letters. Loop has 15 letters. [2020-11-30 00:15:20,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:20,020 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 129 transitions. Stem has 13 letters. Loop has 30 letters. [2020-11-30 00:15:20,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:20,020 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 466 states and 639 transitions. [2020-11-30 00:15:20,025 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 207 [2020-11-30 00:15:20,032 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 466 states to 461 states and 634 transitions. [2020-11-30 00:15:20,032 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 248 [2020-11-30 00:15:20,033 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 251 [2020-11-30 00:15:20,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 461 states and 634 transitions. [2020-11-30 00:15:20,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:20,037 INFO L691 BuchiCegarLoop]: Abstraction has 461 states and 634 transitions. [2020-11-30 00:15:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states and 634 transitions. [2020-11-30 00:15:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 458. [2020-11-30 00:15:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-11-30 00:15:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 631 transitions. [2020-11-30 00:15:20,050 INFO L714 BuchiCegarLoop]: Abstraction has 458 states and 631 transitions. [2020-11-30 00:15:20,050 INFO L594 BuchiCegarLoop]: Abstraction has 458 states and 631 transitions. [2020-11-30 00:15:20,050 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-30 00:15:20,050 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 458 states and 631 transitions. [2020-11-30 00:15:20,059 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 207 [2020-11-30 00:15:20,059 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:20,060 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:20,061 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:20,061 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:20,062 INFO L794 eck$LassoCheckResult]: Stem: 5528#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 5469#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 5470#L178 assume !false; 5783#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 5781#L31 assume 8466 == main_~s__state~0; 5779#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 5778#L80-1 main_~s__state~0 := 8496; 5776#L178 assume !false; 5774#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 5771#L31 assume !(8466 == main_~s__state~0); 5751#L34 assume 8496 == main_~s__state~0; 5747#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 5728#L87-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 5492#L178 assume !false; 5515#L25 [2020-11-30 00:15:20,062 INFO L796 eck$LassoCheckResult]: Loop: 5515#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 5813#L31 assume !(8466 == main_~s__state~0); 5812#L34 assume !(8496 == main_~s__state~0); 5811#L38 assume !(8512 == main_~s__state~0); 5810#L42 assume !(8528 == main_~s__state~0); 5809#L46 assume !(8544 == main_~s__state~0); 5808#L50 assume !(8560 == main_~s__state~0); 5805#L54 assume !(8576 == main_~s__state~0); 5802#L58 assume !(8592 == main_~s__state~0); 5459#L62 assume !(8608 == main_~s__state~0); 5460#L66 assume !(8640 == main_~s__state~0); 5533#L70 assume 8656 == main_~s__state~0; 5637#L71 assume !(2 == main_~blastFlag~0); 5505#L164-1 main_~s__state~0 := 8672; 5500#L178 assume !false; 5515#L25 [2020-11-30 00:15:20,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:20,062 INFO L82 PathProgramCache]: Analyzing trace with hash -923939026, now seen corresponding path program 2 times [2020-11-30 00:15:20,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:20,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610791703] [2020-11-30 00:15:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:20,070 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:20,087 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:20,092 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:20,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1835507732, now seen corresponding path program 1 times [2020-11-30 00:15:20,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:20,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590322531] [2020-11-30 00:15:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:20,109 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:20,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:20,118 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:20,119 INFO L82 PathProgramCache]: Analyzing trace with hash -887705313, now seen corresponding path program 1 times [2020-11-30 00:15:20,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:20,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100299178] [2020-11-30 00:15:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 00:15:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100299178] [2020-11-30 00:15:20,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:20,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:20,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683665611] [2020-11-30 00:15:20,196 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:20,196 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:20,196 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:20,196 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:20,197 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:20,197 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:20,197 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:20,197 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:20,197 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration8_Loop [2020-11-30 00:15:20,197 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:20,197 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:20,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:20,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:20,242 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:20,243 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 34 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:20,247 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:20,248 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 35 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:20,298 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:20,298 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:15:20,303 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:20,340 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:20,340 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:20,341 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:20,341 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:20,341 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:20,341 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:20,341 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:20,341 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:20,341 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration8_Loop [2020-11-30 00:15:20,341 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:20,342 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:20,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:20,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:20,395 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:20,395 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:20,405 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 [2020-11-30 00:15:20,407 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:20,407 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:20,407 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:20,408 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:20,408 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:20,410 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:20,411 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:20,413 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:20,417 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:20,418 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:20,422 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:20,422 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:20,422 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:20,422 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8664 Supporting invariants [] Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:20,460 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:20,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:20,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:20,635 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 [2020-11-30 00:15:20,635 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 458 states and 631 transitions. cyclomatic complexity: 185 Second operand 5 states. [2020-11-30 00:15:20,818 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 458 states and 631 transitions. cyclomatic complexity: 185. Second operand 5 states. Result 1022 states and 1366 transitions. Complement of second has 9 states. [2020-11-30 00:15:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 00:15:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2020-11-30 00:15:20,819 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 99 transitions. Stem has 14 letters. Loop has 15 letters. [2020-11-30 00:15:20,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:20,820 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 99 transitions. Stem has 29 letters. Loop has 15 letters. [2020-11-30 00:15:20,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:20,820 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 99 transitions. Stem has 14 letters. Loop has 30 letters. [2020-11-30 00:15:20,821 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:20,821 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1022 states and 1366 transitions. [2020-11-30 00:15:20,831 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 248 [2020-11-30 00:15:20,839 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1022 states to 870 states and 1159 transitions. [2020-11-30 00:15:20,840 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 318 [2020-11-30 00:15:20,840 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 330 [2020-11-30 00:15:20,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 870 states and 1159 transitions. [2020-11-30 00:15:20,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:20,841 INFO L691 BuchiCegarLoop]: Abstraction has 870 states and 1159 transitions. [2020-11-30 00:15:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states and 1159 transitions. [2020-11-30 00:15:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 835. [2020-11-30 00:15:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2020-11-30 00:15:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1113 transitions. [2020-11-30 00:15:20,860 INFO L714 BuchiCegarLoop]: Abstraction has 835 states and 1113 transitions. [2020-11-30 00:15:20,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:20,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:20,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:20,861 INFO L87 Difference]: Start difference. First operand 835 states and 1113 transitions. Second operand 3 states. [2020-11-30 00:15:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:20,899 INFO L93 Difference]: Finished difference Result 918 states and 1216 transitions. [2020-11-30 00:15:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:20,900 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 918 states and 1216 transitions. [2020-11-30 00:15:20,908 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 329 [2020-11-30 00:15:20,916 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 918 states to 916 states and 1214 transitions. [2020-11-30 00:15:20,917 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 395 [2020-11-30 00:15:20,917 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 407 [2020-11-30 00:15:20,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 916 states and 1214 transitions. [2020-11-30 00:15:20,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:20,918 INFO L691 BuchiCegarLoop]: Abstraction has 916 states and 1214 transitions. [2020-11-30 00:15:20,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states and 1214 transitions. [2020-11-30 00:15:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 904. [2020-11-30 00:15:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-11-30 00:15:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1202 transitions. [2020-11-30 00:15:20,937 INFO L714 BuchiCegarLoop]: Abstraction has 904 states and 1202 transitions. [2020-11-30 00:15:20,937 INFO L594 BuchiCegarLoop]: Abstraction has 904 states and 1202 transitions. [2020-11-30 00:15:20,937 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-30 00:15:20,938 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 904 states and 1202 transitions. [2020-11-30 00:15:20,944 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 329 [2020-11-30 00:15:20,944 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:20,944 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:20,945 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:20,945 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:20,945 INFO L794 eck$LassoCheckResult]: Stem: 8877#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 8815#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 8816#L178 assume !false; 9531#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 9532#L31 assume 8466 == main_~s__state~0; 9669#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 9668#L80-1 main_~s__state~0 := 8496; 9667#L178 assume !false; 9666#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 9665#L31 assume !(8466 == main_~s__state~0); 9664#L34 assume 8496 == main_~s__state~0; 9663#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 9283#L87-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 9281#L178 assume !false; 8855#L25 [2020-11-30 00:15:20,946 INFO L796 eck$LassoCheckResult]: Loop: 8855#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 8856#L31 assume !(8466 == main_~s__state~0); 8843#L34 assume !(8496 == main_~s__state~0); 8796#L38 assume !(8512 == main_~s__state~0); 8797#L42 assume !(8528 == main_~s__state~0); 8874#L46 assume !(8544 == main_~s__state~0); 8868#L50 assume !(8560 == main_~s__state~0); 8841#L54 assume !(8576 == main_~s__state~0); 8792#L58 assume !(8592 == main_~s__state~0); 8793#L62 assume !(8608 == main_~s__state~0); 8807#L66 assume !(8640 == main_~s__state~0); 8861#L70 assume !(8656 == main_~s__state~0); 8821#L74 assume 8672 == main_~s__state~0; 8822#L75 assume !(4 == main_~blastFlag~0); 8878#L174 assume !(5 == main_~blastFlag~0); 8889#L171-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 9127#L178 assume !false; 9124#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 9120#L31 assume !(8466 == main_~s__state~0); 9116#L34 assume 8496 == main_~s__state~0; 9117#L35 assume !(1 == main_~blastFlag~0); 9131#L87-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 8847#L178 assume !false; 8855#L25 [2020-11-30 00:15:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash -923939026, now seen corresponding path program 3 times [2020-11-30 00:15:20,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:20,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379813553] [2020-11-30 00:15:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:20,957 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:20,966 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:20,973 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1607513209, now seen corresponding path program 1 times [2020-11-30 00:15:20,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:20,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967282117] [2020-11-30 00:15:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:20,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967282117] [2020-11-30 00:15:20,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:20,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:20,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004867849] [2020-11-30 00:15:20,999 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:15:20,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:20,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:21,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:21,000 INFO L87 Difference]: Start difference. First operand 904 states and 1202 transitions. cyclomatic complexity: 321 Second operand 3 states. [2020-11-30 00:15:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:21,131 INFO L93 Difference]: Finished difference Result 770 states and 964 transitions. [2020-11-30 00:15:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:21,132 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 770 states and 964 transitions. [2020-11-30 00:15:21,140 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 224 [2020-11-30 00:15:21,148 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 770 states to 757 states and 951 transitions. [2020-11-30 00:15:21,148 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 290 [2020-11-30 00:15:21,149 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 290 [2020-11-30 00:15:21,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 757 states and 951 transitions. [2020-11-30 00:15:21,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:21,150 INFO L691 BuchiCegarLoop]: Abstraction has 757 states and 951 transitions. [2020-11-30 00:15:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states and 951 transitions. [2020-11-30 00:15:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 754. [2020-11-30 00:15:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-11-30 00:15:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 946 transitions. [2020-11-30 00:15:21,170 INFO L714 BuchiCegarLoop]: Abstraction has 754 states and 946 transitions. [2020-11-30 00:15:21,170 INFO L594 BuchiCegarLoop]: Abstraction has 754 states and 946 transitions. [2020-11-30 00:15:21,170 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-30 00:15:21,170 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 754 states and 946 transitions. [2020-11-30 00:15:21,177 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 224 [2020-11-30 00:15:21,178 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:21,178 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:21,181 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:21,181 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:21,182 INFO L794 eck$LassoCheckResult]: Stem: 10557#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10493#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 10494#L178 assume !false; 10787#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 10788#L31 assume 8466 == main_~s__state~0; 11193#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 11192#L80-1 main_~s__state~0 := 8496; 11191#L178 assume !false; 11190#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 11189#L31 assume !(8466 == main_~s__state~0); 11188#L34 assume 8496 == main_~s__state~0; 11187#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 10519#L87-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 10521#L178 assume !false; 10914#L25 [2020-11-30 00:15:21,184 INFO L796 eck$LassoCheckResult]: Loop: 10914#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 11071#L31 assume !(8466 == main_~s__state~0); 11070#L34 assume !(8496 == main_~s__state~0); 11069#L38 assume !(8512 == main_~s__state~0); 11068#L42 assume !(8528 == main_~s__state~0); 11067#L46 assume !(8544 == main_~s__state~0); 11066#L50 assume !(8560 == main_~s__state~0); 11065#L54 assume !(8576 == main_~s__state~0); 11064#L58 assume !(8592 == main_~s__state~0); 11063#L62 assume !(8608 == main_~s__state~0); 10563#L66 assume !(8640 == main_~s__state~0); 10541#L70 assume !(8656 == main_~s__state~0); 10497#L74 assume 8672 == main_~s__state~0; 10498#L75 assume !(4 == main_~blastFlag~0); 10558#L174 assume !(5 == main_~blastFlag~0); 10501#L171-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 10502#L178 assume !false; 11083#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 11082#L31 assume !(8466 == main_~s__state~0); 11081#L34 assume !(8496 == main_~s__state~0); 11080#L38 assume !(8512 == main_~s__state~0); 11079#L42 assume !(8528 == main_~s__state~0); 11078#L46 assume !(8544 == main_~s__state~0); 11077#L50 assume !(8560 == main_~s__state~0); 11075#L54 assume !(8576 == main_~s__state~0); 11073#L58 assume !(8592 == main_~s__state~0); 11072#L62 assume !(8608 == main_~s__state~0); 10859#L66 assume 8640 == main_~s__state~0; 10860#L67 assume !(3 == main_~blastFlag~0); 11076#L153-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8656; 11074#L178 assume !false; 10914#L25 [2020-11-30 00:15:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash -923939026, now seen corresponding path program 4 times [2020-11-30 00:15:21,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:21,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802398276] [2020-11-30 00:15:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:21,196 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:21,215 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:21,219 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:21,220 INFO L82 PathProgramCache]: Analyzing trace with hash 530770115, now seen corresponding path program 1 times [2020-11-30 00:15:21,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:21,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712319086] [2020-11-30 00:15:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:21,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712319086] [2020-11-30 00:15:21,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:21,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:21,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247926290] [2020-11-30 00:15:21,245 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:15:21,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:21,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:21,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:21,246 INFO L87 Difference]: Start difference. First operand 754 states and 946 transitions. cyclomatic complexity: 217 Second operand 3 states. [2020-11-30 00:15:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:21,263 INFO L93 Difference]: Finished difference Result 737 states and 924 transitions. [2020-11-30 00:15:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:21,264 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 737 states and 924 transitions. [2020-11-30 00:15:21,272 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 192 [2020-11-30 00:15:21,279 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 737 states to 725 states and 909 transitions. [2020-11-30 00:15:21,279 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 276 [2020-11-30 00:15:21,280 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 276 [2020-11-30 00:15:21,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 909 transitions. [2020-11-30 00:15:21,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:21,280 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 909 transitions. [2020-11-30 00:15:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 909 transitions. [2020-11-30 00:15:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 670. [2020-11-30 00:15:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-11-30 00:15:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 853 transitions. [2020-11-30 00:15:21,297 INFO L714 BuchiCegarLoop]: Abstraction has 670 states and 853 transitions. [2020-11-30 00:15:21,297 INFO L594 BuchiCegarLoop]: Abstraction has 670 states and 853 transitions. [2020-11-30 00:15:21,297 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-30 00:15:21,297 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 670 states and 853 transitions. [2020-11-30 00:15:21,301 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 168 [2020-11-30 00:15:21,301 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:21,302 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:21,304 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:21,304 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:21,305 INFO L794 eck$LassoCheckResult]: Stem: 12048#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11992#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 11993#L178 assume !false; 12431#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 12432#L31 assume 8466 == main_~s__state~0; 12611#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 12610#L80-1 main_~s__state~0 := 8496; 12609#L178 assume !false; 12607#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 12606#L31 assume !(8466 == main_~s__state~0); 12605#L34 assume 8496 == main_~s__state~0; 12603#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 12600#L87-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 12342#L178 assume !false; 12026#L25 [2020-11-30 00:15:21,305 INFO L796 eck$LassoCheckResult]: Loop: 12026#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 12027#L31 assume !(8466 == main_~s__state~0); 12044#L34 assume !(8496 == main_~s__state~0); 11973#L38 assume !(8512 == main_~s__state~0); 11974#L42 assume !(8528 == main_~s__state~0); 12045#L46 assume !(8544 == main_~s__state~0); 12040#L50 assume !(8560 == main_~s__state~0); 12012#L54 assume !(8576 == main_~s__state~0); 11966#L58 assume !(8592 == main_~s__state~0); 11967#L62 assume !(8608 == main_~s__state~0); 11984#L66 assume !(8640 == main_~s__state~0); 12032#L70 assume !(8656 == main_~s__state~0); 11994#L74 assume 8672 == main_~s__state~0; 11995#L75 assume !(4 == main_~blastFlag~0); 12049#L174 assume !(5 == main_~blastFlag~0); 12433#L171-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 12573#L178 assume !false; 12026#L25 [2020-11-30 00:15:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash -923939026, now seen corresponding path program 5 times [2020-11-30 00:15:21,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:21,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000820614] [2020-11-30 00:15:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:21,318 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:21,327 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:21,338 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1282190981, now seen corresponding path program 1 times [2020-11-30 00:15:21,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:21,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528748480] [2020-11-30 00:15:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:21,346 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:21,349 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:21,350 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1587248888, now seen corresponding path program 1 times [2020-11-30 00:15:21,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:21,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329000826] [2020-11-30 00:15:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 00:15:21,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329000826] [2020-11-30 00:15:21,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:21,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:21,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901958759] [2020-11-30 00:15:21,467 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:21,467 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:21,467 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:21,467 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:21,467 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:21,467 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:21,467 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:21,468 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:21,468 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration11_Loop [2020-11-30 00:15:21,468 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:21,468 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:21,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:21,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:21,482 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:21,569 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:21,569 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 38 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:21,576 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:21,576 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:21,604 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:21,604 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:15:21,608 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:21,630 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:21,630 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:21,630 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:21,630 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:21,631 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:21,631 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:21,631 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:21,631 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:21,631 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration11_Loop [2020-11-30 00:15:21,631 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:21,631 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:21,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:21,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:21,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:21,732 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:21,732 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:21,735 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 [2020-11-30 00:15:21,737 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:21,737 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:21,738 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:21,738 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:21,738 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:21,739 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:21,739 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:15:21,742 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:21,744 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-30 00:15:21,744 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:21,746 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:21,746 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:21,746 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:21,746 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 [] [2020-11-30 00:15:21,768 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:21,914 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 [2020-11-30 00:15:21,914 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 670 states and 853 transitions. cyclomatic complexity: 208 Second operand 5 states. [2020-11-30 00:15:21,929 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 670 states and 853 transitions. cyclomatic complexity: 208. Second operand 5 states. Result 676 states and 859 transitions. Complement of second has 5 states. [2020-11-30 00:15:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 00:15:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-30 00:15:21,930 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 14 letters. Loop has 17 letters. [2020-11-30 00:15:21,930 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:21,931 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:15:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:21,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:21,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:21,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:22,025 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-30 00:15:22,025 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 670 states and 853 transitions. cyclomatic complexity: 208 Second operand 5 states. [2020-11-30 00:15:22,045 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 670 states and 853 transitions. cyclomatic complexity: 208. Second operand 5 states. Result 676 states and 859 transitions. Complement of second has 5 states. [2020-11-30 00:15:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 00:15:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-30 00:15:22,046 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 14 letters. Loop has 17 letters. [2020-11-30 00:15:22,046 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:22,046 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:15:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:22,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:22,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:22,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:22,136 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-30 00:15:22,136 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 670 states and 853 transitions. cyclomatic complexity: 208 Second operand 5 states. [2020-11-30 00:15:22,288 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 670 states and 853 transitions. cyclomatic complexity: 208. Second operand 5 states. Result 1242 states and 1551 transitions. Complement of second has 8 states. [2020-11-30 00:15:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 00:15:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2020-11-30 00:15:22,289 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 108 transitions. Stem has 14 letters. Loop has 17 letters. [2020-11-30 00:15:22,290 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:22,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 108 transitions. Stem has 31 letters. Loop has 17 letters. [2020-11-30 00:15:22,291 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:22,291 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 108 transitions. Stem has 14 letters. Loop has 34 letters. [2020-11-30 00:15:22,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:22,292 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1242 states and 1551 transitions. [2020-11-30 00:15:22,302 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 164 [2020-11-30 00:15:22,309 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1242 states to 801 states and 997 transitions. [2020-11-30 00:15:22,309 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 163 [2020-11-30 00:15:22,310 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 254 [2020-11-30 00:15:22,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 801 states and 997 transitions. [2020-11-30 00:15:22,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:22,310 INFO L691 BuchiCegarLoop]: Abstraction has 801 states and 997 transitions. [2020-11-30 00:15:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states and 997 transitions. [2020-11-30 00:15:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 697. [2020-11-30 00:15:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-11-30 00:15:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 893 transitions. [2020-11-30 00:15:22,324 INFO L714 BuchiCegarLoop]: Abstraction has 697 states and 893 transitions. [2020-11-30 00:15:22,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:22,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:22,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:22,325 INFO L87 Difference]: Start difference. First operand 697 states and 893 transitions. Second operand 3 states. [2020-11-30 00:15:22,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:22,399 INFO L93 Difference]: Finished difference Result 690 states and 883 transitions. [2020-11-30 00:15:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:22,399 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 690 states and 883 transitions. [2020-11-30 00:15:22,404 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 162 [2020-11-30 00:15:22,410 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 690 states to 668 states and 861 transitions. [2020-11-30 00:15:22,411 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 195 [2020-11-30 00:15:22,411 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 195 [2020-11-30 00:15:22,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 668 states and 861 transitions. [2020-11-30 00:15:22,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:22,412 INFO L691 BuchiCegarLoop]: Abstraction has 668 states and 861 transitions. [2020-11-30 00:15:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states and 861 transitions. [2020-11-30 00:15:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 667. [2020-11-30 00:15:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-11-30 00:15:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 860 transitions. [2020-11-30 00:15:22,424 INFO L714 BuchiCegarLoop]: Abstraction has 667 states and 860 transitions. [2020-11-30 00:15:22,424 INFO L594 BuchiCegarLoop]: Abstraction has 667 states and 860 transitions. [2020-11-30 00:15:22,424 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-11-30 00:15:22,424 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 667 states and 860 transitions. [2020-11-30 00:15:22,428 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 162 [2020-11-30 00:15:22,428 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:22,428 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:22,429 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:22,430 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:22,430 INFO L794 eck$LassoCheckResult]: Stem: 17029#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16965#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 16966#L178 assume !false; 17394#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 17392#L31 assume 8466 == main_~s__state~0; 17390#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 17389#L80-1 main_~s__state~0 := 8496; 17388#L178 assume !false; 17387#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 17385#L31 assume !(8466 == main_~s__state~0); 17383#L34 assume 8496 == main_~s__state~0; 17380#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 17378#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 17373#L178 assume !false; 17370#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 17301#L31 assume !(8466 == main_~s__state~0); 17295#L34 assume !(8496 == main_~s__state~0); 17296#L38 assume !(8512 == main_~s__state~0); 17212#L42 assume !(8528 == main_~s__state~0); 17153#L46 assume !(8544 == main_~s__state~0); 17122#L50 assume !(8560 == main_~s__state~0); 17048#L54 [2020-11-30 00:15:22,430 INFO L796 eck$LassoCheckResult]: Loop: 17048#L54 assume 8576 == main_~s__state~0; 17032#L55 main_~tmp___1~0 := main_#t~nondet11;havoc main_#t~nondet11; 16959#L137 assume !(2 == main_~tmp___1~0);main_~s__state~0 := 8592; 16939#L178 assume !false; 17076#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 17071#L31 assume !(8466 == main_~s__state~0); 17065#L34 assume !(8496 == main_~s__state~0); 17060#L38 assume !(8512 == main_~s__state~0); 17054#L42 assume !(8528 == main_~s__state~0); 17046#L46 assume !(8544 == main_~s__state~0); 17047#L50 assume !(8560 == main_~s__state~0); 17048#L54 [2020-11-30 00:15:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash 477150995, now seen corresponding path program 1 times [2020-11-30 00:15:22,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:22,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909689631] [2020-11-30 00:15:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 00:15:22,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909689631] [2020-11-30 00:15:22,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:22,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:22,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059259682] [2020-11-30 00:15:22,474 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:15:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:22,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1797154313, now seen corresponding path program 1 times [2020-11-30 00:15:22,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:22,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327383119] [2020-11-30 00:15:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:22,478 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:22,480 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:22,481 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:22,529 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:22,529 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:22,529 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:22,529 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:22,529 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:22,529 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:22,529 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:22,530 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:22,530 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration12_Loop [2020-11-30 00:15:22,530 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:22,530 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:22,530 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:22,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:22,615 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:22,615 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:22,625 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:22,625 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:22,633 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:15:22,634 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet11=7, ULTIMATE.start_main_~tmp___1~0=7} Honda state: {ULTIMATE.start_main_#t~nondet11=7, ULTIMATE.start_main_~tmp___1~0=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 43 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:22,681 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:22,682 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 44 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:22,706 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:22,706 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:15:22,709 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:22,730 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:22,730 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:22,730 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:22,730 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:22,730 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:22,730 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:22,730 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:22,730 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:22,730 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration12_Loop [2020-11-30 00:15:22,730 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:22,730 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:22,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:22,741 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:22,782 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:22,783 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:22,784 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 [2020-11-30 00:15:22,786 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:22,786 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:22,786 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:22,786 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-30 00:15:22,786 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:22,788 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-30 00:15:22,788 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:15:22,790 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:22,812 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 [2020-11-30 00:15:22,813 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:22,813 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:22,813 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:22,813 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:22,813 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:22,814 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:22,814 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:15:22,816 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:22,819 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:22,819 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 47 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:22,820 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:22,820 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:22,821 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:22,821 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8584 Supporting invariants [] [2020-11-30 00:15:22,841 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:22,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:22,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:22,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:22,931 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 [2020-11-30 00:15:22,931 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 667 states and 860 transitions. cyclomatic complexity: 216 Second operand 4 states. [2020-11-30 00:15:23,194 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 667 states and 860 transitions. cyclomatic complexity: 216. Second operand 4 states. Result 1093 states and 1434 transitions. Complement of second has 9 states. [2020-11-30 00:15:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:15:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2020-11-30 00:15:23,196 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 162 transitions. Stem has 21 letters. Loop has 11 letters. [2020-11-30 00:15:23,196 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:23,196 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 162 transitions. Stem has 32 letters. Loop has 11 letters. [2020-11-30 00:15:23,196 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:23,196 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 162 transitions. Stem has 21 letters. Loop has 22 letters. [2020-11-30 00:15:23,197 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:23,197 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1093 states and 1434 transitions. [2020-11-30 00:15:23,205 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 215 [2020-11-30 00:15:23,213 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1093 states to 965 states and 1269 transitions. [2020-11-30 00:15:23,213 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 279 [2020-11-30 00:15:23,214 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 287 [2020-11-30 00:15:23,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 965 states and 1269 transitions. [2020-11-30 00:15:23,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:23,214 INFO L691 BuchiCegarLoop]: Abstraction has 965 states and 1269 transitions. [2020-11-30 00:15:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states and 1269 transitions. [2020-11-30 00:15:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 796. [2020-11-30 00:15:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2020-11-30 00:15:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1052 transitions. [2020-11-30 00:15:23,233 INFO L714 BuchiCegarLoop]: Abstraction has 796 states and 1052 transitions. [2020-11-30 00:15:23,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:23,234 INFO L87 Difference]: Start difference. First operand 796 states and 1052 transitions. Second operand 3 states. [2020-11-30 00:15:23,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:23,360 INFO L93 Difference]: Finished difference Result 861 states and 1107 transitions. [2020-11-30 00:15:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:23,361 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 861 states and 1107 transitions. [2020-11-30 00:15:23,368 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 207 [2020-11-30 00:15:23,375 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 861 states to 837 states and 1077 transitions. [2020-11-30 00:15:23,375 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 250 [2020-11-30 00:15:23,375 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 253 [2020-11-30 00:15:23,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 837 states and 1077 transitions. [2020-11-30 00:15:23,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:23,378 INFO L691 BuchiCegarLoop]: Abstraction has 837 states and 1077 transitions. [2020-11-30 00:15:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states and 1077 transitions. [2020-11-30 00:15:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 829. [2020-11-30 00:15:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 829 states. [2020-11-30 00:15:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1068 transitions. [2020-11-30 00:15:23,396 INFO L714 BuchiCegarLoop]: Abstraction has 829 states and 1068 transitions. [2020-11-30 00:15:23,396 INFO L594 BuchiCegarLoop]: Abstraction has 829 states and 1068 transitions. [2020-11-30 00:15:23,396 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-11-30 00:15:23,397 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 829 states and 1068 transitions. [2020-11-30 00:15:23,402 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 206 [2020-11-30 00:15:23,402 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:23,402 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:23,403 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:23,403 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:23,403 INFO L794 eck$LassoCheckResult]: Stem: 20567#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 20506#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 20507#L178 assume !false; 20919#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 20918#L31 assume 8466 == main_~s__state~0; 20917#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 20916#L80-1 main_~s__state~0 := 8496; 20915#L178 assume !false; 20914#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 20913#L31 assume !(8466 == main_~s__state~0); 20912#L34 assume 8496 == main_~s__state~0; 20911#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 20910#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 20909#L178 assume !false; 20908#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 20907#L31 assume !(8466 == main_~s__state~0); 20904#L34 assume !(8496 == main_~s__state~0); 20901#L38 assume 8512 == main_~s__state~0; 20844#L39 main_~s__state~0 := 8528; 20840#L178 assume !false; 20842#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 20836#L31 assume !(8466 == main_~s__state~0); 20834#L34 assume !(8496 == main_~s__state~0); 20831#L38 assume !(8512 == main_~s__state~0); 20832#L42 assume !(8528 == main_~s__state~0); 20819#L46 assume !(8544 == main_~s__state~0); 20778#L50 assume !(8560 == main_~s__state~0); 20692#L54 assume 8576 == main_~s__state~0; 20569#L55 [2020-11-30 00:15:23,403 INFO L796 eck$LassoCheckResult]: Loop: 20569#L55 main_~tmp___1~0 := main_#t~nondet11;havoc main_#t~nondet11; 20501#L137 assume 2 == main_~tmp___1~0;main_~s__state~0 := 8466; 20502#L178 assume !false; 20741#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 20739#L31 assume 8466 == main_~s__state~0; 20656#L32 assume !(0 == main_~blastFlag~0); 20736#L80-1 main_~s__state~0 := 8496; 20734#L178 assume !false; 20731#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 20728#L31 assume !(8466 == main_~s__state~0); 20725#L34 assume 8496 == main_~s__state~0; 20654#L35 assume !(1 == main_~blastFlag~0); 20720#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 20717#L178 assume !false; 20716#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 20710#L31 assume !(8466 == main_~s__state~0); 20706#L34 assume !(8496 == main_~s__state~0); 20704#L38 assume 8512 == main_~s__state~0; 20651#L39 main_~s__state~0 := 8528; 20660#L178 assume !false; 20658#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 20655#L31 assume !(8466 == main_~s__state~0); 20653#L34 assume !(8496 == main_~s__state~0); 20650#L38 assume !(8512 == main_~s__state~0); 20647#L42 assume !(8528 == main_~s__state~0); 20643#L46 assume !(8544 == main_~s__state~0); 20638#L50 assume !(8560 == main_~s__state~0); 20634#L54 assume 8576 == main_~s__state~0; 20569#L55 [2020-11-30 00:15:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:23,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1465346930, now seen corresponding path program 1 times [2020-11-30 00:15:23,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:23,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034539505] [2020-11-30 00:15:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 00:15:23,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034539505] [2020-11-30 00:15:23,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:23,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:23,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105125729] [2020-11-30 00:15:23,426 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:15:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1544585997, now seen corresponding path program 1 times [2020-11-30 00:15:23,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:23,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384813123] [2020-11-30 00:15:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 00:15:23,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384813123] [2020-11-30 00:15:23,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:23,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:23,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438371811] [2020-11-30 00:15:23,448 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:15:23,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:23,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:23,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:23,449 INFO L87 Difference]: Start difference. First operand 829 states and 1068 transitions. cyclomatic complexity: 262 Second operand 3 states. [2020-11-30 00:15:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:23,531 INFO L93 Difference]: Finished difference Result 886 states and 1109 transitions. [2020-11-30 00:15:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:23,532 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 886 states and 1109 transitions. [2020-11-30 00:15:23,539 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 212 [2020-11-30 00:15:23,548 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 886 states to 851 states and 1068 transitions. [2020-11-30 00:15:23,548 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 258 [2020-11-30 00:15:23,549 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 260 [2020-11-30 00:15:23,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 851 states and 1068 transitions. [2020-11-30 00:15:23,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:23,550 INFO L691 BuchiCegarLoop]: Abstraction has 851 states and 1068 transitions. [2020-11-30 00:15:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states and 1068 transitions. [2020-11-30 00:15:23,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 836. [2020-11-30 00:15:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-11-30 00:15:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1052 transitions. [2020-11-30 00:15:23,569 INFO L714 BuchiCegarLoop]: Abstraction has 836 states and 1052 transitions. [2020-11-30 00:15:23,569 INFO L594 BuchiCegarLoop]: Abstraction has 836 states and 1052 transitions. [2020-11-30 00:15:23,570 INFO L427 BuchiCegarLoop]: ======== Iteration 14============ [2020-11-30 00:15:23,570 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 836 states and 1052 transitions. [2020-11-30 00:15:23,575 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 211 [2020-11-30 00:15:23,575 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:23,575 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:23,576 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:23,577 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:23,578 INFO L794 eck$LassoCheckResult]: Stem: 22287#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22226#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 22227#L178 assume !false; 22876#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22873#L31 assume 8466 == main_~s__state~0; 22869#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 22870#L80-1 main_~s__state~0 := 8496; 22894#L178 assume !false; 22846#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22826#L31 assume !(8466 == main_~s__state~0); 22825#L34 assume 8496 == main_~s__state~0; 22824#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 22823#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 22822#L178 assume !false; 22820#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22818#L31 assume !(8466 == main_~s__state~0); 22816#L34 assume !(8496 == main_~s__state~0); 22814#L38 assume 8512 == main_~s__state~0; 22812#L39 main_~s__state~0 := 8528; 22811#L178 assume !false; 22809#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22807#L31 assume !(8466 == main_~s__state~0); 22805#L34 assume !(8496 == main_~s__state~0); 22803#L38 assume !(8512 == main_~s__state~0); 22801#L42 assume 8528 == main_~s__state~0; 22798#L43 main_~s__state~0 := 8544; 22796#L178 assume !false; 22794#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22792#L31 assume !(8466 == main_~s__state~0); 22790#L34 assume !(8496 == main_~s__state~0); 22788#L38 assume !(8512 == main_~s__state~0); 22672#L42 assume !(8528 == main_~s__state~0); 22673#L46 assume !(8544 == main_~s__state~0); 22451#L50 assume !(8560 == main_~s__state~0); 22382#L54 assume 8576 == main_~s__state~0; 22292#L55 [2020-11-30 00:15:23,579 INFO L796 eck$LassoCheckResult]: Loop: 22292#L55 main_~tmp___1~0 := main_#t~nondet11;havoc main_#t~nondet11; 22221#L137 assume 2 == main_~tmp___1~0;main_~s__state~0 := 8466; 22222#L178 assume !false; 22473#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22472#L31 assume 8466 == main_~s__state~0; 22380#L32 assume !(0 == main_~blastFlag~0); 22469#L80-1 main_~s__state~0 := 8496; 22467#L178 assume !false; 22465#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22463#L31 assume !(8466 == main_~s__state~0); 22462#L34 assume 8496 == main_~s__state~0; 22378#L35 assume !(1 == main_~blastFlag~0); 22459#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 22457#L178 assume !false; 22455#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22453#L31 assume !(8466 == main_~s__state~0); 22450#L34 assume !(8496 == main_~s__state~0); 22448#L38 assume 8512 == main_~s__state~0; 22373#L39 main_~s__state~0 := 8528; 22442#L178 assume !false; 22439#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22436#L31 assume !(8466 == main_~s__state~0); 22434#L34 assume !(8496 == main_~s__state~0); 22431#L38 assume !(8512 == main_~s__state~0); 22426#L42 assume 8528 == main_~s__state~0; 22368#L43 main_~s__state~0 := 8544; 22388#L178 assume !false; 22383#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 22379#L31 assume !(8466 == main_~s__state~0); 22377#L34 assume !(8496 == main_~s__state~0); 22372#L38 assume !(8512 == main_~s__state~0); 22367#L42 assume !(8528 == main_~s__state~0); 22363#L46 assume !(8544 == main_~s__state~0); 22359#L50 assume !(8560 == main_~s__state~0); 22356#L54 assume 8576 == main_~s__state~0; 22292#L55 [2020-11-30 00:15:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1975408204, now seen corresponding path program 1 times [2020-11-30 00:15:23,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:23,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558206067] [2020-11-30 00:15:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-30 00:15:23,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558206067] [2020-11-30 00:15:23,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:23,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:23,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184107474] [2020-11-30 00:15:23,611 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:15:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:23,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2135132753, now seen corresponding path program 1 times [2020-11-30 00:15:23,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:23,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423488597] [2020-11-30 00:15:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-30 00:15:23,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423488597] [2020-11-30 00:15:23,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:23,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:23,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146908352] [2020-11-30 00:15:23,631 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:15:23,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:23,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:23,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:23,632 INFO L87 Difference]: Start difference. First operand 836 states and 1052 transitions. cyclomatic complexity: 236 Second operand 3 states. [2020-11-30 00:15:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:23,715 INFO L93 Difference]: Finished difference Result 878 states and 1072 transitions. [2020-11-30 00:15:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:23,716 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 878 states and 1072 transitions. [2020-11-30 00:15:23,722 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 206 [2020-11-30 00:15:23,729 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 878 states to 831 states and 1019 transitions. [2020-11-30 00:15:23,729 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 254 [2020-11-30 00:15:23,730 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 256 [2020-11-30 00:15:23,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 831 states and 1019 transitions. [2020-11-30 00:15:23,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:23,730 INFO L691 BuchiCegarLoop]: Abstraction has 831 states and 1019 transitions. [2020-11-30 00:15:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states and 1019 transitions. [2020-11-30 00:15:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 808. [2020-11-30 00:15:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2020-11-30 00:15:23,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 995 transitions. [2020-11-30 00:15:23,747 INFO L714 BuchiCegarLoop]: Abstraction has 808 states and 995 transitions. [2020-11-30 00:15:23,748 INFO L594 BuchiCegarLoop]: Abstraction has 808 states and 995 transitions. [2020-11-30 00:15:23,748 INFO L427 BuchiCegarLoop]: ======== Iteration 15============ [2020-11-30 00:15:23,748 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 808 states and 995 transitions. [2020-11-30 00:15:23,752 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 205 [2020-11-30 00:15:23,753 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:23,753 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:23,757 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:23,757 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:23,757 INFO L794 eck$LassoCheckResult]: Stem: 24012#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 23950#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 23951#L178 assume !false; 24001#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24551#L31 assume 8466 == main_~s__state~0; 24550#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 24549#L80-1 main_~s__state~0 := 8496; 24547#L178 assume !false; 24545#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24543#L31 assume !(8466 == main_~s__state~0); 24541#L34 assume 8496 == main_~s__state~0; 24540#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 24539#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 24537#L178 assume !false; 24534#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24530#L31 assume !(8466 == main_~s__state~0); 24529#L34 assume !(8496 == main_~s__state~0); 24410#L38 assume 8512 == main_~s__state~0; 24411#L39 main_~s__state~0 := 8528; 24468#L178 assume !false; 24467#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24466#L31 assume !(8466 == main_~s__state~0); 24464#L34 assume !(8496 == main_~s__state~0); 24462#L38 assume !(8512 == main_~s__state~0); 24461#L42 assume 8528 == main_~s__state~0; 24459#L43 main_~s__state~0 := 8544; 24457#L178 assume !false; 24455#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24453#L31 assume !(8466 == main_~s__state~0); 24451#L34 assume !(8496 == main_~s__state~0); 24450#L38 assume !(8512 == main_~s__state~0); 24448#L42 assume !(8528 == main_~s__state~0); 24447#L46 assume 8544 == main_~s__state~0; 24438#L47 assume !(0 != 1 + main_~s__verify_mode~0);main_~s__state~0 := 8560; 24434#L178 assume !false; 24432#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24430#L31 assume !(8466 == main_~s__state~0); 24427#L34 assume !(8496 == main_~s__state~0); 24424#L38 assume !(8512 == main_~s__state~0); 24421#L42 assume !(8528 == main_~s__state~0); 24417#L46 assume !(8544 == main_~s__state~0); 24413#L50 assume !(8560 == main_~s__state~0); 24136#L54 assume 8576 == main_~s__state~0; 24015#L55 [2020-11-30 00:15:23,757 INFO L796 eck$LassoCheckResult]: Loop: 24015#L55 main_~tmp___1~0 := main_#t~nondet11;havoc main_#t~nondet11; 23945#L137 assume 2 == main_~tmp___1~0;main_~s__state~0 := 8466; 23946#L178 assume !false; 24306#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24304#L31 assume 8466 == main_~s__state~0; 24103#L32 assume !(0 == main_~blastFlag~0); 24301#L80-1 main_~s__state~0 := 8496; 24300#L178 assume !false; 24298#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24296#L31 assume !(8466 == main_~s__state~0); 24294#L34 assume 8496 == main_~s__state~0; 24100#L35 assume !(1 == main_~blastFlag~0); 24291#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 24289#L178 assume !false; 24288#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24286#L31 assume !(8466 == main_~s__state~0); 24284#L34 assume !(8496 == main_~s__state~0); 24282#L38 assume 8512 == main_~s__state~0; 24097#L39 main_~s__state~0 := 8528; 24279#L178 assume !false; 24245#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24237#L31 assume !(8466 == main_~s__state~0); 24236#L34 assume !(8496 == main_~s__state~0); 24235#L38 assume !(8512 == main_~s__state~0); 24234#L42 assume 8528 == main_~s__state~0; 24094#L43 main_~s__state~0 := 8544; 24231#L178 assume !false; 24230#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24226#L31 assume !(8466 == main_~s__state~0); 24217#L34 assume !(8496 == main_~s__state~0); 24214#L38 assume !(8512 == main_~s__state~0); 24213#L42 assume !(8528 == main_~s__state~0); 24131#L46 assume 8544 == main_~s__state~0; 24091#L47 assume !(0 != 1 + main_~s__verify_mode~0);main_~s__state~0 := 8560; 24107#L178 assume !false; 24105#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 24102#L31 assume !(8466 == main_~s__state~0); 24099#L34 assume !(8496 == main_~s__state~0); 24096#L38 assume !(8512 == main_~s__state~0); 24093#L42 assume !(8528 == main_~s__state~0); 24090#L46 assume !(8544 == main_~s__state~0); 24087#L50 assume !(8560 == main_~s__state~0); 24085#L54 assume 8576 == main_~s__state~0; 24015#L55 [2020-11-30 00:15:23,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash 242898568, now seen corresponding path program 1 times [2020-11-30 00:15:23,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:23,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72947627] [2020-11-30 00:15:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 00:15:23,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72947627] [2020-11-30 00:15:23,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:23,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:23,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877587989] [2020-11-30 00:15:23,785 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:15:23,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:23,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1911359613, now seen corresponding path program 1 times [2020-11-30 00:15:23,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:23,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863294482] [2020-11-30 00:15:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 00:15:23,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863294482] [2020-11-30 00:15:23,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:23,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:23,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842211296] [2020-11-30 00:15:23,808 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:15:23,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:23,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:23,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:23,808 INFO L87 Difference]: Start difference. First operand 808 states and 995 transitions. cyclomatic complexity: 204 Second operand 3 states. [2020-11-30 00:15:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:23,926 INFO L93 Difference]: Finished difference Result 889 states and 1061 transitions. [2020-11-30 00:15:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:23,927 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 889 states and 1061 transitions. [2020-11-30 00:15:23,935 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 182 [2020-11-30 00:15:23,941 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 889 states to 825 states and 988 transitions. [2020-11-30 00:15:23,942 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2020-11-30 00:15:23,942 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 240 [2020-11-30 00:15:23,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 825 states and 988 transitions. [2020-11-30 00:15:23,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:23,943 INFO L691 BuchiCegarLoop]: Abstraction has 825 states and 988 transitions. [2020-11-30 00:15:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states and 988 transitions. [2020-11-30 00:15:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 816. [2020-11-30 00:15:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-11-30 00:15:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 979 transitions. [2020-11-30 00:15:23,970 INFO L714 BuchiCegarLoop]: Abstraction has 816 states and 979 transitions. [2020-11-30 00:15:23,970 INFO L594 BuchiCegarLoop]: Abstraction has 816 states and 979 transitions. [2020-11-30 00:15:23,970 INFO L427 BuchiCegarLoop]: ======== Iteration 16============ [2020-11-30 00:15:23,971 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 816 states and 979 transitions. [2020-11-30 00:15:23,974 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 182 [2020-11-30 00:15:23,974 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:23,974 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:23,975 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:23,975 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:23,976 INFO L794 eck$LassoCheckResult]: Stem: 25708#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 25651#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 25652#L178 assume !false; 26307#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 26308#L31 assume 8466 == main_~s__state~0; 26390#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 26389#L80-1 main_~s__state~0 := 8496; 26388#L178 assume !false; 26387#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 26386#L31 assume !(8466 == main_~s__state~0); 26385#L34 assume 8496 == main_~s__state~0; 26383#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 26384#L87-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 26160#L178 assume !false; 26159#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 26158#L31 assume !(8466 == main_~s__state~0); 26156#L34 assume !(8496 == main_~s__state~0); 26149#L38 assume !(8512 == main_~s__state~0); 26148#L42 assume !(8528 == main_~s__state~0); 26147#L46 assume !(8544 == main_~s__state~0); 26146#L50 assume !(8560 == main_~s__state~0); 26145#L54 assume !(8576 == main_~s__state~0); 26143#L58 assume !(8592 == main_~s__state~0); 26141#L62 assume !(8608 == main_~s__state~0); 26139#L66 assume !(8640 == main_~s__state~0); 26137#L70 assume 8656 == main_~s__state~0; 26135#L71 assume 2 == main_~blastFlag~0;main_~blastFlag~0 := 3; 26134#L164-1 main_~s__state~0 := 8672; 26110#L178 assume !false; 26107#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 26106#L31 assume !(8466 == main_~s__state~0); 26098#L34 assume !(8496 == main_~s__state~0); 26099#L38 assume !(8512 == main_~s__state~0); 26090#L42 assume !(8528 == main_~s__state~0); 26091#L46 assume !(8544 == main_~s__state~0); 26083#L50 assume !(8560 == main_~s__state~0); 26084#L54 assume !(8576 == main_~s__state~0); 26075#L58 assume !(8592 == main_~s__state~0); 26076#L62 assume !(8608 == main_~s__state~0); 26071#L66 assume !(8640 == main_~s__state~0); 26072#L70 assume !(8656 == main_~s__state~0); 25657#L74 assume 8672 == main_~s__state~0; 25658#L75 assume 4 == main_~blastFlag~0;main_~blastFlag~0 := 5; 25659#L171-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 25660#L178 assume !false; 26133#L25 [2020-11-30 00:15:23,976 INFO L796 eck$LassoCheckResult]: Loop: 26133#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 26344#L31 assume !(8466 == main_~s__state~0); 25945#L34 assume !(8496 == main_~s__state~0); 25942#L38 assume !(8512 == main_~s__state~0); 25939#L42 assume !(8528 == main_~s__state~0); 25934#L46 assume !(8544 == main_~s__state~0); 25930#L50 assume !(8560 == main_~s__state~0); 25675#L54 assume !(8576 == main_~s__state~0); 25626#L58 assume !(8592 == main_~s__state~0); 25627#L62 assume !(8608 == main_~s__state~0); 25644#L66 assume !(8640 == main_~s__state~0); 25691#L70 assume 8656 == main_~s__state~0; 25638#L71 assume !(2 == main_~blastFlag~0); 25639#L164-1 main_~s__state~0 := 8672; 25681#L178 assume !false; 26109#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 26106#L31 assume !(8466 == main_~s__state~0); 26098#L34 assume !(8496 == main_~s__state~0); 26099#L38 assume !(8512 == main_~s__state~0); 26090#L42 assume !(8528 == main_~s__state~0); 26091#L46 assume !(8544 == main_~s__state~0); 26083#L50 assume !(8560 == main_~s__state~0); 26084#L54 assume !(8576 == main_~s__state~0); 26075#L58 assume !(8592 == main_~s__state~0); 26076#L62 assume !(8608 == main_~s__state~0); 26071#L66 assume !(8640 == main_~s__state~0); 26072#L70 assume !(8656 == main_~s__state~0); 25657#L74 assume 8672 == main_~s__state~0; 25658#L75 assume 4 == main_~blastFlag~0;main_~blastFlag~0 := 5; 25659#L171-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 25660#L178 assume !false; 26133#L25 [2020-11-30 00:15:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash -359758799, now seen corresponding path program 1 times [2020-11-30 00:15:23,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:23,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466442627] [2020-11-30 00:15:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 00:15:24,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466442627] [2020-11-30 00:15:24,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:24,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:15:24,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011686699] [2020-11-30 00:15:24,009 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:15:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash 944749696, now seen corresponding path program 1 times [2020-11-30 00:15:24,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:24,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277475271] [2020-11-30 00:15:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:24,014 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:24,017 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:24,024 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:24,143 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 20 [2020-11-30 00:15:24,158 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:24,159 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:24,159 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:24,159 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:24,159 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:15:24,159 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:24,159 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:24,159 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:24,159 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration16_Loop [2020-11-30 00:15:24,159 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:24,159 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:24,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:24,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:24,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:24,210 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:24,210 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 48 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:24,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:24,213 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:15:24,216 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:15:24,217 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:24,239 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:15:24,239 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 50 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:24,263 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:15:24,263 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:15:24,267 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:15:24,287 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:15:24,287 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:15:24,287 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:15:24,287 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:15:24,288 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:15:24,288 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:24,288 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:15:24,288 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:15:24,288 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1a.cil.c_Iteration16_Loop [2020-11-30 00:15:24,288 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:15:24,288 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:15:24,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:24,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:24,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:15:24,347 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:15:24,347 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:24,354 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 [2020-11-30 00:15:24,356 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:24,356 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:24,357 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:24,357 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-30 00:15:24,357 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:24,358 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-30 00:15:24,358 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:24,361 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:24,401 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 [2020-11-30 00:15:24,403 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:15:24,403 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:15:24,403 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:15:24,404 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:15:24,404 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:15:24,405 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:15:24,405 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:24,408 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:15:24,413 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:15:24,413 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_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:15:24,417 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:15:24,417 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:15:24,417 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:15:24,417 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 [] Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:15:24,453 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:15:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:24,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:24,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:24,557 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 [2020-11-30 00:15:24,557 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 816 states and 979 transitions. cyclomatic complexity: 179 Second operand 5 states. [2020-11-30 00:15:24,570 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 816 states and 979 transitions. cyclomatic complexity: 179. Second operand 5 states. Result 822 states and 985 transitions. Complement of second has 5 states. [2020-11-30 00:15:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 00:15:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-30 00:15:24,572 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 45 letters. Loop has 31 letters. [2020-11-30 00:15:24,572 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:24,572 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:15:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:24,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:24,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:24,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:24,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:24,720 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-30 00:15:24,720 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 816 states and 979 transitions. cyclomatic complexity: 179 Second operand 5 states. [2020-11-30 00:15:24,730 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 816 states and 979 transitions. cyclomatic complexity: 179. Second operand 5 states. Result 822 states and 985 transitions. Complement of second has 5 states. [2020-11-30 00:15:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 00:15:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-30 00:15:24,731 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 45 letters. Loop has 31 letters. [2020-11-30 00:15:24,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:24,731 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:15:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:24,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:15:24,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:24,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:15:24,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:24,805 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-30 00:15:24,805 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 816 states and 979 transitions. cyclomatic complexity: 179 Second operand 5 states. [2020-11-30 00:15:24,969 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 816 states and 979 transitions. cyclomatic complexity: 179. Second operand 5 states. Result 1762 states and 2064 transitions. Complement of second has 18 states. [2020-11-30 00:15:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-30 00:15:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 00:15:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2020-11-30 00:15:24,971 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 128 transitions. Stem has 45 letters. Loop has 31 letters. [2020-11-30 00:15:24,971 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:24,972 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 128 transitions. Stem has 76 letters. Loop has 31 letters. [2020-11-30 00:15:24,973 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:24,973 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 128 transitions. Stem has 45 letters. Loop has 62 letters. [2020-11-30 00:15:24,975 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:15:24,975 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1762 states and 2064 transitions. [2020-11-30 00:15:24,983 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 146 [2020-11-30 00:15:24,991 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1762 states to 1036 states and 1214 transitions. [2020-11-30 00:15:24,991 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 224 [2020-11-30 00:15:24,992 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-11-30 00:15:24,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1036 states and 1214 transitions. [2020-11-30 00:15:24,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:24,992 INFO L691 BuchiCegarLoop]: Abstraction has 1036 states and 1214 transitions. [2020-11-30 00:15:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states and 1214 transitions. [2020-11-30 00:15:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 864. [2020-11-30 00:15:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2020-11-30 00:15:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1039 transitions. [2020-11-30 00:15:25,008 INFO L714 BuchiCegarLoop]: Abstraction has 864 states and 1039 transitions. [2020-11-30 00:15:25,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:25,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:15:25,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:15:25,009 INFO L87 Difference]: Start difference. First operand 864 states and 1039 transitions. Second operand 3 states. [2020-11-30 00:15:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:25,033 INFO L93 Difference]: Finished difference Result 864 states and 1036 transitions. [2020-11-30 00:15:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:15:25,033 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 864 states and 1036 transitions. [2020-11-30 00:15:25,037 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 146 [2020-11-30 00:15:25,043 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 864 states to 864 states and 1036 transitions. [2020-11-30 00:15:25,043 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 227 [2020-11-30 00:15:25,043 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 227 [2020-11-30 00:15:25,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 864 states and 1036 transitions. [2020-11-30 00:15:25,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:15:25,044 INFO L691 BuchiCegarLoop]: Abstraction has 864 states and 1036 transitions. [2020-11-30 00:15:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states and 1036 transitions. [2020-11-30 00:15:25,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 864. [2020-11-30 00:15:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2020-11-30 00:15:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1036 transitions. [2020-11-30 00:15:25,058 INFO L714 BuchiCegarLoop]: Abstraction has 864 states and 1036 transitions. [2020-11-30 00:15:25,058 INFO L594 BuchiCegarLoop]: Abstraction has 864 states and 1036 transitions. [2020-11-30 00:15:25,058 INFO L427 BuchiCegarLoop]: ======== Iteration 17============ [2020-11-30 00:15:25,059 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 864 states and 1036 transitions. [2020-11-30 00:15:25,061 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 146 [2020-11-30 00:15:25,062 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:15:25,062 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:15:25,063 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:25,063 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:25,063 INFO L794 eck$LassoCheckResult]: Stem: 32390#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 32337#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_#t~nondet9, main_#t~nondet10, main_#t~nondet11, main_~s__state~0, main_~s__hit~0, main_~s__verify_mode~0, main_~s__session__peer~0, main_~s__s3__tmp__new_cipher__algorithms~0, main_~buf~0, main_~cb~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;main_~s__verify_mode~0 := main_#t~nondet8;havoc main_#t~nondet8;main_~s__session__peer~0 := main_#t~nondet9;havoc main_#t~nondet9;main_~s__s3__tmp__new_cipher__algorithms~0 := main_#t~nondet10;havoc main_#t~nondet10;havoc main_~buf~0;havoc main_~cb~0;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 32338#L178 assume !false; 32853#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32852#L31 assume 8466 == main_~s__state~0; 32851#L32 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 1; 32850#L80-1 main_~s__state~0 := 8496; 32849#L178 assume !false; 32848#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32847#L31 assume !(8466 == main_~s__state~0); 32846#L34 assume 8496 == main_~s__state~0; 32845#L35 assume 1 == main_~blastFlag~0;main_~blastFlag~0 := 2; 32842#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 32841#L178 assume !false; 32839#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32836#L31 assume !(8466 == main_~s__state~0); 32833#L34 assume !(8496 == main_~s__state~0); 32830#L38 assume 8512 == main_~s__state~0; 32826#L39 main_~s__state~0 := 8528; 32822#L178 assume !false; 32818#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32813#L31 assume !(8466 == main_~s__state~0); 32812#L34 assume !(8496 == main_~s__state~0); 32811#L38 assume !(8512 == main_~s__state~0); 32809#L42 assume 8528 == main_~s__state~0; 32807#L43 main_~s__state~0 := 8544; 32805#L178 assume !false; 32803#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32801#L31 assume !(8466 == main_~s__state~0); 32800#L34 assume !(8496 == main_~s__state~0); 32747#L38 assume !(8512 == main_~s__state~0); 32746#L42 assume !(8528 == main_~s__state~0); 32744#L46 assume 8544 == main_~s__state~0; 32737#L47 assume 0 != 1 + main_~s__verify_mode~0; 32738#L107 assume !(0 != main_~s__session__peer~0); 32655#L114 assume !(0 != (256 + main_~s__s3__tmp__new_cipher__algorithms~0) % 4294967296); 32653#L122 main_~s__state~0 := 8576; 32626#L178 assume !false; 32627#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32621#L31 assume !(8466 == main_~s__state~0); 32619#L34 assume !(8496 == main_~s__state~0); 32617#L38 assume !(8512 == main_~s__state~0); 32615#L42 assume !(8528 == main_~s__state~0); 32589#L46 assume !(8544 == main_~s__state~0); 32590#L50 assume !(8560 == main_~s__state~0); 32487#L54 assume 8576 == main_~s__state~0; 32407#L55 [2020-11-30 00:15:25,063 INFO L796 eck$LassoCheckResult]: Loop: 32407#L55 main_~tmp___1~0 := main_#t~nondet11;havoc main_#t~nondet11; 32332#L137 assume 2 == main_~tmp___1~0;main_~s__state~0 := 8466; 32333#L178 assume !false; 33003#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 33000#L31 assume 8466 == main_~s__state~0; 32345#L32 assume !(0 == main_~blastFlag~0); 32301#L80-1 main_~s__state~0 := 8496; 32302#L178 assume !false; 32955#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32951#L31 assume !(8466 == main_~s__state~0); 32947#L34 assume 8496 == main_~s__state~0; 32862#L35 assume !(1 == main_~blastFlag~0); 32941#L87-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 32938#L178 assume !false; 32936#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32934#L31 assume !(8466 == main_~s__state~0); 32932#L34 assume !(8496 == main_~s__state~0); 32930#L38 assume 8512 == main_~s__state~0; 32884#L39 main_~s__state~0 := 8528; 32929#L178 assume !false; 32928#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32926#L31 assume !(8466 == main_~s__state~0); 32924#L34 assume !(8496 == main_~s__state~0); 32922#L38 assume !(8512 == main_~s__state~0); 32388#L42 assume 8528 == main_~s__state~0; 32347#L43 main_~s__state~0 := 8544; 32348#L178 assume !false; 32913#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32911#L31 assume !(8466 == main_~s__state~0); 32909#L34 assume !(8496 == main_~s__state~0); 32907#L38 assume !(8512 == main_~s__state~0); 32905#L42 assume !(8528 == main_~s__state~0); 32903#L46 assume 8544 == main_~s__state~0; 32305#L47 assume 0 != 1 + main_~s__verify_mode~0; 32307#L107 assume !(0 != main_~s__session__peer~0); 32351#L114 assume !(0 != (256 + main_~s__s3__tmp__new_cipher__algorithms~0) % 4294967296); 32315#L122 main_~s__state~0 := 8576; 32316#L178 assume !false; 32888#L25 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 32886#L31 assume !(8466 == main_~s__state~0); 32885#L34 assume !(8496 == main_~s__state~0); 32883#L38 assume !(8512 == main_~s__state~0); 32882#L42 assume !(8528 == main_~s__state~0); 32881#L46 assume !(8544 == main_~s__state~0); 32880#L50 assume !(8560 == main_~s__state~0); 32878#L54 assume 8576 == main_~s__state~0; 32407#L55 [2020-11-30 00:15:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1923687841, now seen corresponding path program 1 times [2020-11-30 00:15:25,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:25,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525044974] [2020-11-30 00:15:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:25,077 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:25,086 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:25,091 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:25,091 INFO L82 PathProgramCache]: Analyzing trace with hash -180445498, now seen corresponding path program 1 times [2020-11-30 00:15:25,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:25,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219585385] [2020-11-30 00:15:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:25,097 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:25,102 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:25,104 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1007086694, now seen corresponding path program 1 times [2020-11-30 00:15:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:25,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229946013] [2020-11-30 00:15:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:25,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:25,126 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:25,133 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:25,282 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2020-11-30 00:15:25,818 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 97 [2020-11-30 00:15:25,947 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 00:15:25,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 30.11 12:15:25 BoogieIcfgContainer [2020-11-30 00:15:25,988 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-30 00:15:25,988 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:15:25,988 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:15:25,989 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:15:25,989 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:15:13" (3/4) ... [2020-11-30 00:15:25,992 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-30 00:15:26,062 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_24547fca-14e7-456c-bbfa-d9793cc88ebe/bin/uautomizer/witness.graphml [2020-11-30 00:15:26,062 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:15:26,063 INFO L168 Benchmark]: Toolchain (without parser) took 13776.99 ms. Allocated memory was 98.6 MB in the beginning and 176.2 MB in the end (delta: 77.6 MB). Free memory was 66.3 MB in the beginning and 62.4 MB in the end (delta: 3.9 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:26,064 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 77.6 MB. Free memory was 50.8 MB in the beginning and 50.7 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:15:26,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.82 ms. Allocated memory is still 98.6 MB. Free memory was 66.1 MB in the beginning and 76.7 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:26,065 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.79 ms. Allocated memory is still 98.6 MB. Free memory was 76.7 MB in the beginning and 75.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:26,065 INFO L168 Benchmark]: Boogie Preprocessor took 23.79 ms. Allocated memory is still 98.6 MB. Free memory was 75.4 MB in the beginning and 73.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:26,066 INFO L168 Benchmark]: RCFGBuilder took 460.08 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 55.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:26,066 INFO L168 Benchmark]: BuchiAutomizer took 12887.97 ms. Allocated memory was 98.6 MB in the beginning and 176.2 MB in the end (delta: 77.6 MB). Free memory was 55.1 MB in the beginning and 66.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 85.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:26,066 INFO L168 Benchmark]: Witness Printer took 74.29 ms. Allocated memory is still 176.2 MB. Free memory was 66.6 MB in the beginning and 62.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:26,069 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 77.6 MB. Free memory was 50.8 MB in the beginning and 50.7 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.82 ms. Allocated memory is still 98.6 MB. Free memory was 66.1 MB in the beginning and 76.7 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.79 ms. Allocated memory is still 98.6 MB. Free memory was 76.7 MB in the beginning and 75.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.79 ms. Allocated memory is still 98.6 MB. Free memory was 75.4 MB in the beginning and 73.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 460.08 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 55.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 12887.97 ms. Allocated memory was 98.6 MB in the beginning and 176.2 MB in the end (delta: 77.6 MB). Free memory was 55.1 MB in the beginning and 66.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 85.4 MB. Max. memory is 16.1 GB. * Witness Printer took 74.29 ms. Allocated memory is still 176.2 MB. Free memory was 66.6 MB in the beginning and 62.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 25 terminating modules (14 trivial, 9 deterministic, 2 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * s__state + 8481 and consists of 5 locations. One deterministic module has affine ranking function -1 * s__state + 8504 and consists of 4 locations. One deterministic module has affine ranking function -1 * s__state + 8520 and consists of 5 locations. One deterministic module has affine ranking function -1 * s__state + 8536 and consists of 5 locations. One deterministic module has affine ranking function -1 * s__state + 8552 and consists of 5 locations. One deterministic module has affine ranking function -1 * s__state + 8568 and consists of 5 locations. One deterministic module has affine ranking function -2 * blastFlag + 5 and consists of 3 locations. One deterministic module has affine ranking function -1 * s__state + 8664 and consists of 5 locations. One deterministic module has affine ranking function -1 * s__state + 8584 and consists of 5 locations. One nondeterministic module has affine ranking function s__state and consists of 4 locations. One nondeterministic module has affine ranking function s__state and consists of 5 locations. 14 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 864 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 12.8s and 17 iterations. TraceHistogramMax:6. Analysis of lassos took 6.4s. Construction of modules took 2.4s. Büchi inclusion checks took 3.0s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 25. Automata minimization 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 1053 StatesRemovedByMinimization, 22 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 904 states and ocurred in iteration 8. Nontrivial modules had stage [9, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/13 HoareTripleCheckerStatistics: 1825 SDtfs, 1275 SDslu, 935 SDs, 0 SdLazy, 1965 SolverSat, 198 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT2 conc0 concLT3 SILN0 SILU0 SILI3 SILT6 lasso0 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp67 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq197 hnf89 smp100 dnf114 smp94 tf113 neg99 sie101 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 7ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 0 MotzkinApplications: 4 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 11 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 54]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=28914} State at position 1 is {NULL=0, NULL=0, NULL=0, NULL=28917, NULL=0, tmp___1=2, \result=0, NULL=28915, cb=0, NULL=28914, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@49b2cadb=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@f9ea61e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1e94f7ee=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@740c6592=0, s__session__peer=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2b379dda=2, NULL=0, s__hit=0, NULL=28916, buf=0, s__verify_mode=8, blastFlag=2, s__s3__tmp__new_cipher__algorithms=4294967040, s__state=8576} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 54]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L11] int s__state ; [L12] int s__hit = __VERIFIER_nondet_int() ; [L13] int s__verify_mode = __VERIFIER_nondet_int() ; [L14] int s__session__peer = __VERIFIER_nondet_int() ; [L15] unsigned long s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_long() ; [L16] int buf ; [L17] int cb ; [L18] int blastFlag ; [L19] int tmp___1; [L21] s__state = 8466 [L22] blastFlag = 0 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND TRUE s__state == 8466 [L80] COND TRUE blastFlag == 0 [L81] blastFlag = 1 [L83] s__state = 8496 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND TRUE s__state == 8496 [L87] COND TRUE blastFlag == 1 [L88] blastFlag = 2 [L90] COND FALSE !(\read(s__hit)) [L93] s__state = 8512 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND FALSE !(s__state == 8496) [L38] COND TRUE s__state == 8512 [L98] s__state = 8528 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND FALSE !(s__state == 8496) [L38] COND FALSE !(s__state == 8512) [L42] COND TRUE s__state == 8528 [L102] s__state = 8544 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND FALSE !(s__state == 8496) [L38] COND FALSE !(s__state == 8512) [L42] COND FALSE !(s__state == 8528) [L46] COND TRUE s__state == 8544 [L106] COND TRUE s__verify_mode + 1 [L107] COND FALSE !(s__session__peer != 0) [L115] COND FALSE !(s__s3__tmp__new_cipher__algorithms + 256UL) [L123] s__state = 8576 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND FALSE !(s__state == 8496) [L38] COND FALSE !(s__state == 8512) [L42] COND FALSE !(s__state == 8528) [L46] COND FALSE !(s__state == 8544) [L50] COND FALSE !(s__state == 8560) [L54] COND TRUE s__state == 8576 Loop: [L136] tmp___1 = __VERIFIER_nondet_int() [L137] COND TRUE tmp___1 == 2 [L138] s__state = 8466 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND TRUE s__state == 8466 [L80] COND FALSE !(blastFlag == 0) [L83] s__state = 8496 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND TRUE s__state == 8496 [L87] COND FALSE !(blastFlag == 1) [L90] COND FALSE !(\read(s__hit)) [L93] s__state = 8512 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND FALSE !(s__state == 8496) [L38] COND TRUE s__state == 8512 [L98] s__state = 8528 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND FALSE !(s__state == 8496) [L38] COND FALSE !(s__state == 8512) [L42] COND TRUE s__state == 8528 [L102] s__state = 8544 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND FALSE !(s__state == 8496) [L38] COND FALSE !(s__state == 8512) [L42] COND FALSE !(s__state == 8528) [L46] COND TRUE s__state == 8544 [L106] COND TRUE s__verify_mode + 1 [L107] COND FALSE !(s__session__peer != 0) [L115] COND FALSE !(s__s3__tmp__new_cipher__algorithms + 256UL) [L123] s__state = 8576 [L24] COND TRUE 1 [L25] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L31] COND FALSE !(s__state == 8466) [L34] COND FALSE !(s__state == 8496) [L38] COND FALSE !(s__state == 8512) [L42] COND FALSE !(s__state == 8528) [L46] COND FALSE !(s__state == 8544) [L50] COND FALSE !(s__state == 8560) [L54] COND TRUE s__state == 8576 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...