./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.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_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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 fe54aa6cbf5093caec91497905a5a8a5f126c540 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-29 19:43:15,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:43:15,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:43:15,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:43:15,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:43:15,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:43:15,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:43:15,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:43:15,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:43:15,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:43:15,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:43:15,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:43:15,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:43:15,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:43:15,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:43:15,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:43:15,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:43:15,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:43:15,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:43:15,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:43:15,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:43:15,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:43:15,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:43:15,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:43:15,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:43:15,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:43:15,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:43:15,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:43:15,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:43:15,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:43:15,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:43:15,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:43:15,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:43:15,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:43:15,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:43:15,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:43:15,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:43:15,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:43:15,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:43:15,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:43:15,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:43:15,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 19:43:15,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:43:15,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:43:15,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:43:15,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:43:15,739 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:43:15,739 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 19:43:15,739 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 19:43:15,740 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 19:43:15,740 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 19:43:15,740 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 19:43:15,740 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 19:43:15,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:43:15,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:43:15,741 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:43:15,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:43:15,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:43:15,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:43:15,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 19:43:15,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 19:43:15,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 19:43:15,744 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:43:15,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:43:15,744 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 19:43:15,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:43:15,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 19:43:15,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:43:15,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:43:15,746 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 19:43:15,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:43:15,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:43:15,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:43:15,747 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 19:43:15,748 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 19:43:15,749 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_e8cd6d6c-40d7-40f1-984b-23972a268d80/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe54aa6cbf5093caec91497905a5a8a5f126c540 [2020-11-29 19:43:16,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:43:16,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:43:16,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:43:16,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:43:16,125 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:43:16,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/../../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c [2020-11-29 19:43:16,226 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/data/ba27010a8/5e599a51d89b4c35a62ed4a6cac26903/FLAG65ca38476 [2020-11-29 19:43:17,000 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:43:17,006 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c [2020-11-29 19:43:17,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/data/ba27010a8/5e599a51d89b4c35a62ed4a6cac26903/FLAG65ca38476 [2020-11-29 19:43:17,050 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/data/ba27010a8/5e599a51d89b4c35a62ed4a6cac26903 [2020-11-29 19:43:17,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:43:17,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:43:17,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:43:17,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:43:17,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:43:17,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14111855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17, skipping insertion in model container [2020-11-29 19:43:17,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:43:17,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:43:17,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:43:17,387 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:43:17,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:43:17,448 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:43:17,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17 WrapperNode [2020-11-29 19:43:17,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:43:17,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:43:17,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:43:17,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:43:17,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:43:17,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:43:17,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:43:17,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:43:17,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... [2020-11-29 19:43:17,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:43:17,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:43:17,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:43:17,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:43:17,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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 [2020-11-29 19:43:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:43:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:43:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:43:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:43:18,084 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:43:18,085 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-29 19:43:18,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:18 BoogieIcfgContainer [2020-11-29 19:43:18,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:43:18,088 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 19:43:18,088 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 19:43:18,104 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 19:43:18,105 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:43:18,105 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 07:43:17" (1/3) ... [2020-11-29 19:43:18,107 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4000d612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:43:18, skipping insertion in model container [2020-11-29 19:43:18,107 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:43:18,107 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:17" (2/3) ... [2020-11-29 19:43:18,108 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4000d612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:43:18, skipping insertion in model container [2020-11-29 19:43:18,108 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:43:18,108 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:18" (3/3) ... [2020-11-29 19:43:18,110 INFO L373 chiAutomizerObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-11-29 19:43:18,202 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 19:43:18,202 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 19:43:18,202 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 19:43:18,203 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:43:18,203 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:43:18,203 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 19:43:18,203 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:43:18,204 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 19:43:18,222 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states. [2020-11-29 19:43:18,237 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-11-29 19:43:18,238 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:18,238 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:18,245 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 19:43:18,245 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-29 19:43:18,245 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 19:43:18,246 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states. [2020-11-29 19:43:18,248 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-11-29 19:43:18,248 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:18,248 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:18,249 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 19:43:18,249 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-29 19:43:18,257 INFO L794 eck$LassoCheckResult]: Stem: 17#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); 14#L-1true havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 6#L101true [2020-11-29 19:43:18,258 INFO L796 eck$LassoCheckResult]: Loop: 6#L101true assume !false; 12#L20true assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 4#L26true assume 8466 == main_~s__state~0; 8#L27true assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 5#L59-1true assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 6#L101true [2020-11-29 19:43:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:18,265 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-29 19:43:18,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:18,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947244273] [2020-11-29 19:43:18,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:18,446 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:18,487 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:18,517 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:18,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:18,523 INFO L82 PathProgramCache]: Analyzing trace with hash 39284085, now seen corresponding path program 1 times [2020-11-29 19:43:18,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:18,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062898547] [2020-11-29 19:43:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:18,546 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:18,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:18,570 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723571, now seen corresponding path program 1 times [2020-11-29 19:43:18,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:18,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687493584] [2020-11-29 19:43:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:18,603 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:18,627 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:18,632 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:18,774 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:18,775 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:18,775 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:18,775 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:18,775 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:43:18,775 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:18,775 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:18,776 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:18,776 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration1_Loop [2020-11-29 19:43:18,776 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:18,776 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:18,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:18,841 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:18,855 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:18,987 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:18,988 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:19,001 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:19,001 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 [2020-11-29 19:43:19,014 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:43:19,015 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_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:19,064 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:19,064 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:19,115 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:43:19,115 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:19,126 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:43:19,166 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:19,167 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:19,167 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:19,167 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:19,167 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:43:19,167 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:19,167 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:19,167 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:19,168 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration1_Loop [2020-11-29 19:43:19,168 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:19,168 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:19,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:19,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:19,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:19,372 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:19,379 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:19,386 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 [2020-11-29 19:43:19,389 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:19,389 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:19,390 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:19,390 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:43:19,390 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:19,393 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:43:19,393 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:19,397 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:19,446 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 [2020-11-29 19:43:19,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:19,449 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:19,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:19,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:43:19,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:19,451 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:43:19,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:19,456 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:43:19,461 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:43:19,462 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_e8cd6d6c-40d7-40f1-984b-23972a268d80/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 [2020-11-29 19:43:19,471 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:43:19,471 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:43:19,471 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:43:19,472 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~blastFlag~0) = -1*ULTIMATE.start_main_~blastFlag~0 + 1 Supporting invariants [] [2020-11-29 19:43:19,516 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:43:19,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:43:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:43:19,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:19,715 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 [2020-11-29 19:43:19,716 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states. Second operand 4 states. [2020-11-29 19:43:19,838 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states.. Second operand 4 states. Result 53 states and 85 transitions. Complement of second has 5 states. [2020-11-29 19:43:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:43:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 19:43:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2020-11-29 19:43:19,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 2 letters. Loop has 5 letters. [2020-11-29 19:43:19,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:19,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 7 letters. Loop has 5 letters. [2020-11-29 19:43:19,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:19,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 2 letters. Loop has 10 letters. [2020-11-29 19:43:19,851 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:19,852 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 85 transitions. [2020-11-29 19:43:19,867 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-11-29 19:43:19,873 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 38 states and 59 transitions. [2020-11-29 19:43:19,874 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2020-11-29 19:43:19,875 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2020-11-29 19:43:19,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 59 transitions. [2020-11-29 19:43:19,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:19,876 INFO L691 BuchiCegarLoop]: Abstraction has 38 states and 59 transitions. [2020-11-29 19:43:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 59 transitions. [2020-11-29 19:43:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-11-29 19:43:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 19:43:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 57 transitions. [2020-11-29 19:43:19,921 INFO L714 BuchiCegarLoop]: Abstraction has 36 states and 57 transitions. [2020-11-29 19:43:19,921 INFO L594 BuchiCegarLoop]: Abstraction has 36 states and 57 transitions. [2020-11-29 19:43:19,921 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 19:43:19,921 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 57 transitions. [2020-11-29 19:43:19,926 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-11-29 19:43:19,927 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:19,927 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:19,928 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 19:43:19,928 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-29 19:43:19,928 INFO L794 eck$LassoCheckResult]: Stem: 155#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); 153#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 154#L101 assume !false; 138#L20 [2020-11-29 19:43:19,928 INFO L796 eck$LassoCheckResult]: Loop: 138#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 128#L26 assume 8466 == main_~s__state~0; 129#L27 assume !(0 == main_~blastFlag~0); 134#L59-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 135#L101 assume !false; 138#L20 [2020-11-29 19:43:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2020-11-29 19:43:19,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:19,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470011047] [2020-11-29 19:43:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:19,961 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:19,992 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:19,996 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:20,005 INFO L82 PathProgramCache]: Analyzing trace with hash 44013377, now seen corresponding path program 1 times [2020-11-29 19:43:20,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:20,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068896011] [2020-11-29 19:43:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:20,011 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:20,015 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:20,027 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:20,028 INFO L82 PathProgramCache]: Analyzing trace with hash 297857786, now seen corresponding path program 1 times [2020-11-29 19:43:20,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:20,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744898443] [2020-11-29 19:43:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:20,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744898443] [2020-11-29 19:43:20,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:20,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:20,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685067771] [2020-11-29 19:43:20,154 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:20,154 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:20,155 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:20,155 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:20,155 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:43:20,155 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:20,155 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:20,155 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:20,155 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration2_Loop [2020-11-29 19:43:20,156 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:20,156 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:20,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:20,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:20,172 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:20,262 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:20,262 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:20,272 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:20,299 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:43:20,333 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:43:20,334 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_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:20,387 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:20,388 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:20,393 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:43:20,393 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~blastFlag~0=1} Honda state: {ULTIMATE.start_main_~blastFlag~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:20,425 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:20,426 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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 [2020-11-29 19:43:20,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:43:20,456 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:43:20,462 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:43:20,498 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:20,499 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:20,499 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:20,499 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:20,499 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:43:20,499 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:20,499 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:20,499 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:20,499 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration2_Loop [2020-11-29 19:43:20,499 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:20,500 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:20,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:20,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:20,535 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:20,613 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:20,613 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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 [2020-11-29 19:43:20,617 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 [2020-11-29 19:43:20,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:20,619 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:20,619 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:20,619 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:43:20,619 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:20,621 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:43:20,621 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:43:20,623 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:20,666 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 [2020-11-29 19:43:20,668 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:20,668 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:20,668 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:20,668 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 19:43:20,669 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:20,671 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 19:43:20,671 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:43:20,673 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:20,718 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 [2020-11-29 19:43:20,720 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:20,720 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:20,720 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:20,720 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:43:20,720 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:20,722 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:43:20,722 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 [2020-11-29 19:43:20,725 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:43:20,729 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:43:20,729 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_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:20,734 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:43:20,734 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:43:20,734 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:43:20,735 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8489 Supporting invariants [] Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:20,774 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:43:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:20,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:43:20,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:20,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:43:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:20,883 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 [2020-11-29 19:43:20,883 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 57 transitions. cyclomatic complexity: 23 Second operand 5 states. [2020-11-29 19:43:20,984 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 57 transitions. cyclomatic complexity: 23. Second operand 5 states. Result 104 states and 155 transitions. Complement of second has 7 states. [2020-11-29 19:43:20,985 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 [2020-11-29 19:43:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 19:43:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2020-11-29 19:43:20,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 3 letters. Loop has 5 letters. [2020-11-29 19:43:20,987 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:20,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 8 letters. Loop has 5 letters. [2020-11-29 19:43:20,987 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:20,988 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 3 letters. Loop has 10 letters. [2020-11-29 19:43:20,988 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:20,988 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 104 states and 155 transitions. [2020-11-29 19:43:20,995 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-11-29 19:43:20,997 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 104 states to 77 states and 121 transitions. [2020-11-29 19:43:20,997 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2020-11-29 19:43:20,998 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2020-11-29 19:43:20,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 121 transitions. [2020-11-29 19:43:20,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:20,999 INFO L691 BuchiCegarLoop]: Abstraction has 77 states and 121 transitions. [2020-11-29 19:43:20,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states and 121 transitions. [2020-11-29 19:43:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-11-29 19:43:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 19:43:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 86 transitions. [2020-11-29 19:43:21,006 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 86 transitions. [2020-11-29 19:43:21,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:21,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:21,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:21,011 INFO L87 Difference]: Start difference. First operand 54 states and 86 transitions. Second operand 3 states. [2020-11-29 19:43:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:21,071 INFO L93 Difference]: Finished difference Result 90 states and 128 transitions. [2020-11-29 19:43:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:21,072 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 90 states and 128 transitions. [2020-11-29 19:43:21,077 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2020-11-29 19:43:21,079 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 90 states to 87 states and 125 transitions. [2020-11-29 19:43:21,079 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2020-11-29 19:43:21,080 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2020-11-29 19:43:21,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 125 transitions. [2020-11-29 19:43:21,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:21,080 INFO L691 BuchiCegarLoop]: Abstraction has 87 states and 125 transitions. [2020-11-29 19:43:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states and 125 transitions. [2020-11-29 19:43:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-11-29 19:43:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-29 19:43:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 123 transitions. [2020-11-29 19:43:21,088 INFO L714 BuchiCegarLoop]: Abstraction has 85 states and 123 transitions. [2020-11-29 19:43:21,088 INFO L594 BuchiCegarLoop]: Abstraction has 85 states and 123 transitions. [2020-11-29 19:43:21,088 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 19:43:21,088 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 85 states and 123 transitions. [2020-11-29 19:43:21,090 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2020-11-29 19:43:21,091 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:21,091 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:21,091 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 19:43:21,091 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:43:21,092 INFO L794 eck$LassoCheckResult]: Stem: 493#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); 491#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 492#L101 assume !false; 472#L20 [2020-11-29 19:43:21,092 INFO L796 eck$LassoCheckResult]: Loop: 472#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 467#L26 assume !(8466 == main_~s__state~0); 468#L31 assume 8512 == main_~s__state~0; 489#L32 main_~tmp___1~0 := main_#t~nondet8;havoc main_#t~nondet8; 480#L71 assume 0 != main_~tmp___1~0;main_~s__state~0 := 8466; 471#L101 assume !false; 472#L20 [2020-11-29 19:43:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:21,092 INFO L82 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 2 times [2020-11-29 19:43:21,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:21,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462820188] [2020-11-29 19:43:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:21,104 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:21,113 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:21,117 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1365729718, now seen corresponding path program 1 times [2020-11-29 19:43:21,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:21,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974358439] [2020-11-29 19:43:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:21,122 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:21,126 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:21,128 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash 644971805, now seen corresponding path program 1 times [2020-11-29 19:43:21,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:21,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788672954] [2020-11-29 19:43:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:21,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788672954] [2020-11-29 19:43:21,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:21,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:21,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005123377] [2020-11-29 19:43:21,238 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:21,238 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:21,238 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:21,238 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:21,238 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:43:21,239 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:21,239 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:21,239 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:21,239 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration3_Loop [2020-11-29 19:43:21,239 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:21,239 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:21,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:21,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:21,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:21,408 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:21,408 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:21,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:21,418 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:43:21,435 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:43:21,435 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet8=-4, ULTIMATE.start_main_~tmp___1~0=-4} Honda state: {ULTIMATE.start_main_#t~nondet8=-4, ULTIMATE.start_main_~tmp___1~0=-4} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:21,525 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:21,525 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:21,579 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:43:21,580 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:43:21,590 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:43:21,632 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:21,632 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:21,632 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:21,632 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:21,632 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:43:21,633 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:21,633 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:21,633 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:21,633 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration3_Loop [2020-11-29 19:43:21,633 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:21,633 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:21,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:21,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:21,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:21,742 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:21,742 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:21,750 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 [2020-11-29 19:43:21,752 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:21,753 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:21,753 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:21,753 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 19:43:21,753 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:21,756 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 19:43:21,757 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:21,761 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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 [2020-11-29 19:43:21,806 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 [2020-11-29 19:43:21,814 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:21,814 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:21,815 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:21,815 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:43:21,815 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:21,817 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:43:21,817 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:43:21,823 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:43:21,828 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:43:21,828 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_e8cd6d6c-40d7-40f1-984b-23972a268d80/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 [2020-11-29 19:43:21,882 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:43:21,882 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:43:21,882 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:43:21,882 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 [] [2020-11-29 19:43:21,926 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:43:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:43:21,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:43:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:22,007 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 [2020-11-29 19:43:22,007 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 85 states and 123 transitions. cyclomatic complexity: 44 Second operand 5 states. [2020-11-29 19:43:22,143 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 85 states and 123 transitions. cyclomatic complexity: 44. Second operand 5 states. Result 170 states and 232 transitions. Complement of second has 9 states. [2020-11-29 19:43:22,145 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 [2020-11-29 19:43:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 19:43:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2020-11-29 19:43:22,146 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 39 transitions. Stem has 3 letters. Loop has 6 letters. [2020-11-29 19:43:22,146 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:22,147 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 39 transitions. Stem has 9 letters. Loop has 6 letters. [2020-11-29 19:43:22,147 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:22,147 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 39 transitions. Stem has 3 letters. Loop has 12 letters. [2020-11-29 19:43:22,148 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:22,148 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 232 transitions. [2020-11-29 19:43:22,152 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2020-11-29 19:43:22,155 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 141 states and 196 transitions. [2020-11-29 19:43:22,155 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 47 [2020-11-29 19:43:22,156 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 49 [2020-11-29 19:43:22,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 196 transitions. [2020-11-29 19:43:22,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:22,156 INFO L691 BuchiCegarLoop]: Abstraction has 141 states and 196 transitions. [2020-11-29 19:43:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states and 196 transitions. [2020-11-29 19:43:22,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 105. [2020-11-29 19:43:22,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-29 19:43:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2020-11-29 19:43:22,183 INFO L714 BuchiCegarLoop]: Abstraction has 105 states and 148 transitions. [2020-11-29 19:43:22,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:22,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:22,185 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand 3 states. [2020-11-29 19:43:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:22,224 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2020-11-29 19:43:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:22,225 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 94 transitions. [2020-11-29 19:43:22,226 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2020-11-29 19:43:22,227 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 61 states and 90 transitions. [2020-11-29 19:43:22,228 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-11-29 19:43:22,228 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-11-29 19:43:22,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 90 transitions. [2020-11-29 19:43:22,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:22,228 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 90 transitions. [2020-11-29 19:43:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 90 transitions. [2020-11-29 19:43:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-11-29 19:43:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-29 19:43:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 90 transitions. [2020-11-29 19:43:22,238 INFO L714 BuchiCegarLoop]: Abstraction has 61 states and 90 transitions. [2020-11-29 19:43:22,239 INFO L594 BuchiCegarLoop]: Abstraction has 61 states and 90 transitions. [2020-11-29 19:43:22,239 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 19:43:22,239 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 61 states and 90 transitions. [2020-11-29 19:43:22,240 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2020-11-29 19:43:22,240 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:22,240 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:22,243 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:22,243 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:43:22,243 INFO L794 eck$LassoCheckResult]: Stem: 979#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); 978#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 953#L101 assume !false; 954#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 951#L26 assume 8466 == main_~s__state~0; 952#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 988#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 985#L101 assume !false; 984#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 982#L26 assume !(8466 == main_~s__state~0); 974#L31 [2020-11-29 19:43:22,244 INFO L796 eck$LassoCheckResult]: Loop: 974#L31 assume 8512 == main_~s__state~0; 975#L32 main_~tmp___1~0 := main_#t~nondet8;havoc main_#t~nondet8; 961#L71 assume !(0 != main_~tmp___1~0);main_~s__state~0 := 8640; 946#L101 assume !false; 972#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 973#L26 assume !(8466 == main_~s__state~0); 974#L31 [2020-11-29 19:43:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:22,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1523382593, now seen corresponding path program 1 times [2020-11-29 19:43:22,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:22,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644685110] [2020-11-29 19:43:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:22,268 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:22,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:22,296 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:22,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1623382260, now seen corresponding path program 1 times [2020-11-29 19:43:22,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:22,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205694795] [2020-11-29 19:43:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:22,321 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:22,325 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:22,327 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:22,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1141286606, now seen corresponding path program 1 times [2020-11-29 19:43:22,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:22,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276093238] [2020-11-29 19:43:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:22,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276093238] [2020-11-29 19:43:22,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:22,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:22,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265043834] [2020-11-29 19:43:22,490 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:22,491 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:22,491 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:22,491 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:22,491 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:43:22,491 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:22,491 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:22,491 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:22,491 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration4_Loop [2020-11-29 19:43:22,492 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:22,492 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:22,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:22,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:22,566 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:22,567 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:22,570 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:22,571 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:22,611 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:43:22,611 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:43:22,617 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:43:22,642 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:22,642 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:22,642 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:22,643 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:22,643 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:43:22,643 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:22,643 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:22,643 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:22,643 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration4_Loop [2020-11-29 19:43:22,643 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:22,643 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:22,644 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:22,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:22,737 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:22,738 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:22,745 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 [2020-11-29 19:43:22,747 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:22,747 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:22,747 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:22,747 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:43:22,748 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:22,750 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:43:22,751 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:22,763 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:43:22,767 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:43:22,767 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_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:22,771 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:43:22,771 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:43:22,771 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:43:22,771 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8576 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:22,800 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:43:22,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:22,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:43:22,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:43:22,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:22,901 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 [2020-11-29 19:43:22,901 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61 states and 90 transitions. cyclomatic complexity: 33 Second operand 4 states. [2020-11-29 19:43:23,056 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 61 states and 90 transitions. cyclomatic complexity: 33. Second operand 4 states. Result 183 states and 281 transitions. Complement of second has 9 states. [2020-11-29 19:43:23,058 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 [2020-11-29 19:43:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 19:43:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2020-11-29 19:43:23,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 55 transitions. Stem has 10 letters. Loop has 6 letters. [2020-11-29 19:43:23,059 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:23,059 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 55 transitions. Stem has 16 letters. Loop has 6 letters. [2020-11-29 19:43:23,059 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:23,059 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 55 transitions. Stem has 10 letters. Loop has 12 letters. [2020-11-29 19:43:23,060 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:23,060 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 281 transitions. [2020-11-29 19:43:23,063 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 32 [2020-11-29 19:43:23,074 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 163 states and 245 transitions. [2020-11-29 19:43:23,076 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2020-11-29 19:43:23,077 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 60 [2020-11-29 19:43:23,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 245 transitions. [2020-11-29 19:43:23,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:23,077 INFO L691 BuchiCegarLoop]: Abstraction has 163 states and 245 transitions. [2020-11-29 19:43:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 245 transitions. [2020-11-29 19:43:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2020-11-29 19:43:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-29 19:43:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 183 transitions. [2020-11-29 19:43:23,093 INFO L714 BuchiCegarLoop]: Abstraction has 125 states and 183 transitions. [2020-11-29 19:43:23,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:23,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:23,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:23,094 INFO L87 Difference]: Start difference. First operand 125 states and 183 transitions. Second operand 3 states. [2020-11-29 19:43:23,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:23,146 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-11-29 19:43:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:23,149 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 164 states and 223 transitions. [2020-11-29 19:43:23,151 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 36 [2020-11-29 19:43:23,153 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 164 states to 154 states and 211 transitions. [2020-11-29 19:43:23,153 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2020-11-29 19:43:23,154 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-11-29 19:43:23,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 154 states and 211 transitions. [2020-11-29 19:43:23,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:23,154 INFO L691 BuchiCegarLoop]: Abstraction has 154 states and 211 transitions. [2020-11-29 19:43:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states and 211 transitions. [2020-11-29 19:43:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2020-11-29 19:43:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-29 19:43:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 191 transitions. [2020-11-29 19:43:23,177 INFO L714 BuchiCegarLoop]: Abstraction has 134 states and 191 transitions. [2020-11-29 19:43:23,177 INFO L594 BuchiCegarLoop]: Abstraction has 134 states and 191 transitions. [2020-11-29 19:43:23,177 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 19:43:23,177 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 134 states and 191 transitions. [2020-11-29 19:43:23,179 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 35 [2020-11-29 19:43:23,181 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:23,181 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:23,182 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,184 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,184 INFO L794 eck$LassoCheckResult]: Stem: 1590#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); 1588#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 1589#L101 assume !false; 1668#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1656#L26 assume 8466 == main_~s__state~0; 1648#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 1646#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 1560#L101 [2020-11-29 19:43:23,185 INFO L796 eck$LassoCheckResult]: Loop: 1560#L101 assume !false; 1564#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1554#L26 assume !(8466 == main_~s__state~0); 1555#L31 assume !(8512 == main_~s__state~0); 1550#L47 assume !(8640 == main_~s__state~0); 1551#L51 assume 8656 == main_~s__state~0; 1580#L52 assume 2 == main_~blastFlag~0;main_~blastFlag~0 := 3; 1582#L90-1 assume 4 == main_~blastFlag~0;main_~blastFlag~0 := 5; 1578#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 1559#L101 assume !false; 1627#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1628#L26 assume 8466 == main_~s__state~0; 1621#L27 assume !(0 == main_~blastFlag~0); 1558#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 1560#L101 [2020-11-29 19:43:23,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 1 times [2020-11-29 19:43:23,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060302050] [2020-11-29 19:43:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,206 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,217 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,221 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1982564596, now seen corresponding path program 1 times [2020-11-29 19:43:23,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345891364] [2020-11-29 19:43:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:23,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345891364] [2020-11-29 19:43:23,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:23,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:23,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101663653] [2020-11-29 19:43:23,239 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:43:23,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:23,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:23,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:23,240 INFO L87 Difference]: Start difference. First operand 134 states and 191 transitions. cyclomatic complexity: 65 Second operand 3 states. [2020-11-29 19:43:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:23,283 INFO L93 Difference]: Finished difference Result 182 states and 254 transitions. [2020-11-29 19:43:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:23,284 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 254 transitions. [2020-11-29 19:43:23,287 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2020-11-29 19:43:23,289 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 182 states and 254 transitions. [2020-11-29 19:43:23,289 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 70 [2020-11-29 19:43:23,290 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 70 [2020-11-29 19:43:23,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 182 states and 254 transitions. [2020-11-29 19:43:23,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:23,290 INFO L691 BuchiCegarLoop]: Abstraction has 182 states and 254 transitions. [2020-11-29 19:43:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states and 254 transitions. [2020-11-29 19:43:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-11-29 19:43:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-11-29 19:43:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 254 transitions. [2020-11-29 19:43:23,310 INFO L714 BuchiCegarLoop]: Abstraction has 182 states and 254 transitions. [2020-11-29 19:43:23,310 INFO L594 BuchiCegarLoop]: Abstraction has 182 states and 254 transitions. [2020-11-29 19:43:23,311 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 19:43:23,311 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 182 states and 254 transitions. [2020-11-29 19:43:23,312 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2020-11-29 19:43:23,314 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:23,314 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:23,315 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,316 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,316 INFO L794 eck$LassoCheckResult]: Stem: 1921#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1918#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 1884#L101 assume !false; 1885#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2042#L26 assume 8466 == main_~s__state~0; 2006#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2002#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 1925#L101 [2020-11-29 19:43:23,316 INFO L796 eck$LassoCheckResult]: Loop: 1925#L101 assume !false; 1975#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1976#L26 assume !(8466 == main_~s__state~0); 1968#L31 assume !(8512 == main_~s__state~0); 1969#L47 assume !(8640 == main_~s__state~0); 1904#L51 assume 8656 == main_~s__state~0; 1905#L52 assume 2 == main_~blastFlag~0;main_~blastFlag~0 := 3; 1911#L90-1 assume !(4 == main_~blastFlag~0); 1927#L97 assume !(5 == main_~blastFlag~0); 1900#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 1901#L101 assume !false; 2036#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2028#L26 assume 8466 == main_~s__state~0; 2020#L27 assume !(0 == main_~blastFlag~0); 1985#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 1925#L101 [2020-11-29 19:43:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 2 times [2020-11-29 19:43:23,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258599413] [2020-11-29 19:43:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,339 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,347 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,350 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,351 INFO L82 PathProgramCache]: Analyzing trace with hash 862619384, now seen corresponding path program 1 times [2020-11-29 19:43:23,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895622803] [2020-11-29 19:43:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:23,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895622803] [2020-11-29 19:43:23,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:23,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:23,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174408383] [2020-11-29 19:43:23,369 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:43:23,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:23,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:23,370 INFO L87 Difference]: Start difference. First operand 182 states and 254 transitions. cyclomatic complexity: 80 Second operand 3 states. [2020-11-29 19:43:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:23,472 INFO L93 Difference]: Finished difference Result 157 states and 202 transitions. [2020-11-29 19:43:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:23,472 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 202 transitions. [2020-11-29 19:43:23,474 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 45 [2020-11-29 19:43:23,476 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 111 states and 141 transitions. [2020-11-29 19:43:23,476 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 58 [2020-11-29 19:43:23,476 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2020-11-29 19:43:23,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 141 transitions. [2020-11-29 19:43:23,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:23,477 INFO L691 BuchiCegarLoop]: Abstraction has 111 states and 141 transitions. [2020-11-29 19:43:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states and 141 transitions. [2020-11-29 19:43:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2020-11-29 19:43:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-29 19:43:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2020-11-29 19:43:23,482 INFO L714 BuchiCegarLoop]: Abstraction has 105 states and 134 transitions. [2020-11-29 19:43:23,482 INFO L594 BuchiCegarLoop]: Abstraction has 105 states and 134 transitions. [2020-11-29 19:43:23,483 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 19:43:23,483 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 105 states and 134 transitions. [2020-11-29 19:43:23,484 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 45 [2020-11-29 19:43:23,484 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:23,484 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:23,486 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,486 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,486 INFO L794 eck$LassoCheckResult]: Stem: 2250#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); 2245#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 2246#L101 assume !false; 2287#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2288#L26 assume 8466 == main_~s__state~0; 2276#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2271#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 2255#L101 [2020-11-29 19:43:23,486 INFO L796 eck$LassoCheckResult]: Loop: 2255#L101 assume !false; 2290#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2291#L26 assume !(8466 == main_~s__state~0); 2280#L31 assume !(8512 == main_~s__state~0); 2281#L47 assume !(8640 == main_~s__state~0); 2316#L51 assume 8656 == main_~s__state~0; 2243#L52 assume 2 == main_~blastFlag~0;main_~blastFlag~0 := 3; 2244#L90-1 assume !(4 == main_~blastFlag~0); 2256#L97 assume !(5 == main_~blastFlag~0); 2240#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 2227#L101 assume !false; 2228#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2219#L26 assume !(8466 == main_~s__state~0); 2220#L31 assume !(8512 == main_~s__state~0); 2247#L47 assume 8640 == main_~s__state~0; 2317#L48 assume !(3 == main_~blastFlag~0); 2254#L79-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8656; 2255#L101 [2020-11-29 19:43:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 3 times [2020-11-29 19:43:23,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143146574] [2020-11-29 19:43:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,509 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,523 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,529 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,533 INFO L82 PathProgramCache]: Analyzing trace with hash 49895967, now seen corresponding path program 1 times [2020-11-29 19:43:23,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325847080] [2020-11-29 19:43:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:23,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325847080] [2020-11-29 19:43:23,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:23,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:23,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045313528] [2020-11-29 19:43:23,574 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:43:23,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:23,575 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. cyclomatic complexity: 36 Second operand 3 states. [2020-11-29 19:43:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:23,612 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2020-11-29 19:43:23,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:23,613 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 146 transitions. [2020-11-29 19:43:23,614 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 56 [2020-11-29 19:43:23,615 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 116 states and 146 transitions. [2020-11-29 19:43:23,615 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2020-11-29 19:43:23,616 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 64 [2020-11-29 19:43:23,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 146 transitions. [2020-11-29 19:43:23,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:23,616 INFO L691 BuchiCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-11-29 19:43:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states and 146 transitions. [2020-11-29 19:43:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-11-29 19:43:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-11-29 19:43:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-11-29 19:43:23,619 INFO L714 BuchiCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-11-29 19:43:23,619 INFO L594 BuchiCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-11-29 19:43:23,619 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 19:43:23,619 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 116 states and 146 transitions. [2020-11-29 19:43:23,620 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 56 [2020-11-29 19:43:23,620 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:23,620 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:23,624 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,624 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,624 INFO L794 eck$LassoCheckResult]: Stem: 2476#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2473#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 2454#L101 assume !false; 2455#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2530#L26 assume 8466 == main_~s__state~0; 2504#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2497#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 2499#L101 [2020-11-29 19:43:23,625 INFO L796 eck$LassoCheckResult]: Loop: 2499#L101 assume !false; 2548#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2547#L26 assume !(8466 == main_~s__state~0); 2546#L31 assume !(8512 == main_~s__state~0); 2545#L47 assume !(8640 == main_~s__state~0); 2544#L51 assume 8656 == main_~s__state~0; 2540#L52 assume !(2 == main_~blastFlag~0); 2481#L90-1 assume !(4 == main_~blastFlag~0); 2482#L97 assume !(5 == main_~blastFlag~0); 2549#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 2525#L101 assume !false; 2531#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2532#L26 assume !(8466 == main_~s__state~0); 2512#L31 assume !(8512 == main_~s__state~0); 2513#L47 assume 8640 == main_~s__state~0; 2485#L48 assume !(3 == main_~blastFlag~0); 2486#L79-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8656; 2499#L101 [2020-11-29 19:43:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 4 times [2020-11-29 19:43:23,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129795634] [2020-11-29 19:43:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,644 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,668 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,674 INFO L82 PathProgramCache]: Analyzing trace with hash 750960545, now seen corresponding path program 1 times [2020-11-29 19:43:23,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030088866] [2020-11-29 19:43:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:23,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030088866] [2020-11-29 19:43:23,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:23,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:43:23,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289283377] [2020-11-29 19:43:23,695 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:43:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:23,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:23,696 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. cyclomatic complexity: 38 Second operand 3 states. [2020-11-29 19:43:23,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:23,708 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2020-11-29 19:43:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:23,709 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 142 states and 175 transitions. [2020-11-29 19:43:23,710 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 41 [2020-11-29 19:43:23,712 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 142 states to 137 states and 167 transitions. [2020-11-29 19:43:23,712 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 85 [2020-11-29 19:43:23,712 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2020-11-29 19:43:23,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 167 transitions. [2020-11-29 19:43:23,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:23,713 INFO L691 BuchiCegarLoop]: Abstraction has 137 states and 167 transitions. [2020-11-29 19:43:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states and 167 transitions. [2020-11-29 19:43:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 109. [2020-11-29 19:43:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-29 19:43:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2020-11-29 19:43:23,716 INFO L714 BuchiCegarLoop]: Abstraction has 109 states and 136 transitions. [2020-11-29 19:43:23,716 INFO L594 BuchiCegarLoop]: Abstraction has 109 states and 136 transitions. [2020-11-29 19:43:23,716 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 19:43:23,716 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 109 states and 136 transitions. [2020-11-29 19:43:23,718 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 41 [2020-11-29 19:43:23,718 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:23,718 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:23,719 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,719 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:23,719 INFO L794 eck$LassoCheckResult]: Stem: 2741#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); 2737#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 2738#L101 assume !false; 2789#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2790#L26 assume 8466 == main_~s__state~0; 2781#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2778#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 2718#L101 [2020-11-29 19:43:23,719 INFO L796 eck$LassoCheckResult]: Loop: 2718#L101 assume !false; 2719#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2710#L26 assume !(8466 == main_~s__state~0); 2711#L31 assume !(8512 == main_~s__state~0); 2708#L47 assume !(8640 == main_~s__state~0); 2709#L51 assume 8656 == main_~s__state~0; 2811#L52 assume !(2 == main_~blastFlag~0); 2747#L90-1 assume !(4 == main_~blastFlag~0); 2748#L97 assume !(5 == main_~blastFlag~0); 2731#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 2718#L101 [2020-11-29 19:43:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 5 times [2020-11-29 19:43:23,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425805378] [2020-11-29 19:43:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,734 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,737 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1947655960, now seen corresponding path program 1 times [2020-11-29 19:43:23,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538314358] [2020-11-29 19:43:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:23,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:23,749 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:23,750 INFO L82 PathProgramCache]: Analyzing trace with hash 163931656, now seen corresponding path program 1 times [2020-11-29 19:43:23,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:23,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203711633] [2020-11-29 19:43:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:23,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203711633] [2020-11-29 19:43:23,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:23,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:23,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473985752] [2020-11-29 19:43:23,862 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:23,862 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:23,862 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:23,862 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:23,862 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:43:23,862 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:23,862 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:23,862 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:23,862 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration9_Loop [2020-11-29 19:43:23,862 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:23,863 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:23,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:23,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:23,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:24,017 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:24,017 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:24,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:24,022 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 [2020-11-29 19:43:24,027 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:43:24,027 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_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:24,072 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:43:24,072 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:24,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:43:24,108 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:43:24,124 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:43:24,150 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:43:24,150 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:43:24,151 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:43:24,151 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:43:24,151 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:43:24,151 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:24,151 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:43:24,151 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:43:24,151 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration9_Loop [2020-11-29 19:43:24,151 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:43:24,151 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:43:24,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:24,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:24,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:43:24,321 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:43:24,321 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:24,329 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 [2020-11-29 19:43:24,331 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:24,331 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:24,331 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:24,331 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 19:43:24,331 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:24,336 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 19:43:24,336 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:24,339 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:24,368 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 [2020-11-29 19:43:24,370 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:43:24,370 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:43:24,370 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:43:24,370 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:43:24,370 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:43:24,371 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:43:24,372 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:43:24,374 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:43:24,384 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:43:24,385 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_e8cd6d6c-40d7-40f1-984b-23972a268d80/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) [2020-11-29 19:43:24,388 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:43:24,388 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:43:24,388 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:43:24,388 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:43:24,431 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:43:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:24,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:43:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:24,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:43:24,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:43:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:43:24,496 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 [2020-11-29 19:43:24,496 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 109 states and 136 transitions. cyclomatic complexity: 36 Second operand 4 states. [2020-11-29 19:43:24,606 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 109 states and 136 transitions. cyclomatic complexity: 36. Second operand 4 states. Result 148 states and 178 transitions. Complement of second has 6 states. [2020-11-29 19:43:24,607 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 [2020-11-29 19:43:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 19:43:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2020-11-29 19:43:24,608 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 7 letters. Loop has 10 letters. [2020-11-29 19:43:24,610 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:24,610 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 17 letters. Loop has 10 letters. [2020-11-29 19:43:24,610 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:24,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 7 letters. Loop has 20 letters. [2020-11-29 19:43:24,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:43:24,611 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 148 states and 178 transitions. [2020-11-29 19:43:24,614 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 41 [2020-11-29 19:43:24,616 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 148 states to 109 states and 132 transitions. [2020-11-29 19:43:24,616 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-11-29 19:43:24,616 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-11-29 19:43:24,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 132 transitions. [2020-11-29 19:43:24,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:24,616 INFO L691 BuchiCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-11-29 19:43:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states and 132 transitions. [2020-11-29 19:43:24,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-11-29 19:43:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-29 19:43:24,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2020-11-29 19:43:24,620 INFO L714 BuchiCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-11-29 19:43:24,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:24,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:24,622 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 3 states. [2020-11-29 19:43:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:24,647 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-11-29 19:43:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:24,648 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 92 states and 106 transitions. [2020-11-29 19:43:24,649 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2020-11-29 19:43:24,650 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 92 states to 62 states and 71 transitions. [2020-11-29 19:43:24,650 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2020-11-29 19:43:24,650 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-11-29 19:43:24,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 71 transitions. [2020-11-29 19:43:24,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:43:24,651 INFO L691 BuchiCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-11-29 19:43:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 71 transitions. [2020-11-29 19:43:24,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-29 19:43:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 19:43:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-11-29 19:43:24,653 INFO L714 BuchiCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-11-29 19:43:24,653 INFO L594 BuchiCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-11-29 19:43:24,653 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 19:43:24,653 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 71 transitions. [2020-11-29 19:43:24,654 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2020-11-29 19:43:24,654 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:43:24,654 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:43:24,655 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:24,655 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:24,655 INFO L794 eck$LassoCheckResult]: Stem: 3274#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); 3272#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 3273#L101 assume !false; 3298#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3296#L26 assume 8466 == main_~s__state~0; 3258#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 3248#L59-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 3249#L101 assume !false; 3292#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3288#L26 assume !(8466 == main_~s__state~0); 3282#L31 assume 8512 == main_~s__state~0; 3275#L32 [2020-11-29 19:43:24,655 INFO L796 eck$LassoCheckResult]: Loop: 3275#L32 main_~tmp___1~0 := main_#t~nondet8;havoc main_#t~nondet8; 3259#L71 assume 0 != main_~tmp___1~0;main_~s__state~0 := 8466; 3260#L101 assume !false; 3299#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3297#L26 assume 8466 == main_~s__state~0; 3285#L27 assume !(0 == main_~blastFlag~0); 3295#L59-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 3293#L101 assume !false; 3289#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3284#L26 assume !(8466 == main_~s__state~0); 3283#L31 assume 8512 == main_~s__state~0; 3275#L32 [2020-11-29 19:43:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash 21626939, now seen corresponding path program 1 times [2020-11-29 19:43:24,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:24,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911503177] [2020-11-29 19:43:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:24,676 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:24,685 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:24,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:24,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:24,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1294878776, now seen corresponding path program 1 times [2020-11-29 19:43:24,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:24,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724829300] [2020-11-29 19:43:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:24,707 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:24,712 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:24,714 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:24,718 INFO L82 PathProgramCache]: Analyzing trace with hash 937672638, now seen corresponding path program 1 times [2020-11-29 19:43:24,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:24,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423958603] [2020-11-29 19:43:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:24,732 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:43:24,741 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:43:24,751 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:43:25,072 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-11-29 19:43:25,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 07:43:25 BoogieIcfgContainer [2020-11-29 19:43:25,203 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 19:43:25,204 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:43:25,204 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:43:25,204 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:43:25,216 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:18" (3/4) ... [2020-11-29 19:43:25,219 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 19:43:25,281 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e8cd6d6c-40d7-40f1-984b-23972a268d80/bin/uautomizer/witness.graphml [2020-11-29 19:43:25,285 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:43:25,286 INFO L168 Benchmark]: Toolchain (without parser) took 8225.48 ms. Allocated memory was 88.1 MB in the beginning and 151.0 MB in the end (delta: 62.9 MB). Free memory was 56.2 MB in the beginning and 68.4 MB in the end (delta: -12.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:25,287 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 88.1 MB. Free memory was 45.7 MB in the beginning and 45.7 MB in the end (delta: 35.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:43:25,288 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.59 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 55.9 MB in the beginning and 90.5 MB in the end (delta: -34.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:25,288 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.85 ms. Allocated memory is still 113.2 MB. Free memory was 90.5 MB in the beginning and 89.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:25,289 INFO L168 Benchmark]: Boogie Preprocessor took 57.34 ms. Allocated memory is still 113.2 MB. Free memory was 89.0 MB in the beginning and 88.4 MB in the end (delta: 557.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:43:25,289 INFO L168 Benchmark]: RCFGBuilder took 518.97 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 74.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:25,290 INFO L168 Benchmark]: BuchiAutomizer took 7115.38 ms. Allocated memory was 113.2 MB in the beginning and 151.0 MB in the end (delta: 37.7 MB). Free memory was 74.3 MB in the beginning and 70.5 MB in the end (delta: 3.8 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:25,290 INFO L168 Benchmark]: Witness Printer took 80.87 ms. Allocated memory is still 151.0 MB. Free memory was 70.5 MB in the beginning and 68.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:25,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 88.1 MB. Free memory was 45.7 MB in the beginning and 45.7 MB in the end (delta: 35.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 390.59 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 55.9 MB in the beginning and 90.5 MB in the end (delta: -34.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.85 ms. Allocated memory is still 113.2 MB. Free memory was 90.5 MB in the beginning and 89.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.34 ms. Allocated memory is still 113.2 MB. Free memory was 89.0 MB in the beginning and 88.4 MB in the end (delta: 557.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 518.97 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 74.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 7115.38 ms. Allocated memory was 113.2 MB in the beginning and 151.0 MB in the end (delta: 37.7 MB). Free memory was 74.3 MB in the beginning and 70.5 MB in the end (delta: 3.8 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.1 GB. * Witness Printer took 80.87 ms. Allocated memory is still 151.0 MB. Free memory was 70.5 MB in the beginning and 68.4 MB in the end (delta: 2.1 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 13 terminating modules (8 trivial, 5 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * blastFlag + 1 and consists of 4 locations. One deterministic module has affine ranking function -1 * s__state + 8489 and consists of 4 locations. One deterministic module has affine ranking function s__state and consists of 5 locations. One deterministic module has affine ranking function -1 * s__state + 8576 and consists of 5 locations. One deterministic module has affine ranking function s__state and consists of 4 locations. 8 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 62 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.9s and 10 iterations. TraceHistogramMax:2. Analysis of lassos took 5.0s. Construction of modules took 0.5s. Büchi inclusion checks took 1.0s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 13. Automata minimization 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 155 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 182 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 352 SDtfs, 248 SDslu, 196 SDs, 0 SdLazy, 269 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time LassoAnalysisResults: nont1 unkn0 SFLI4 SFLT1 conc0 concLT4 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf97 lsp52 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq190 hnf91 smp100 dnf177 smp79 tf112 neg94 sie115 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 13ms VariablesStem: 0 VariablesLoop: 1 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 0 MotzkinApplications: 4 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 31]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {NULL=0, NULL=0, NULL=0, NULL=2, NULL=0, \result=0, tmp___1=14, NULL=3, NULL=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2ec07d24=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3c5a211d=14, NULL=0, s__hit=0, NULL=4, blastFlag=2, s__state=8512} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 31]: 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 blastFlag ; [L14] int tmp___1; [L16] s__state = 8466 [L17] blastFlag = 0 [L19] COND TRUE 1 [L20] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L26] COND TRUE s__state == 8466 [L59] COND TRUE blastFlag == 0 [L60] blastFlag = 2 [L62] COND FALSE !(\read(s__hit)) [L65] s__state = 8512 [L19] COND TRUE 1 [L20] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L26] COND FALSE !(s__state == 8466) [L31] COND TRUE s__state == 8512 Loop: [L70] tmp___1 = __VERIFIER_nondet_int() [L71] COND TRUE \read(tmp___1) [L72] s__state = 8466 [L19] COND TRUE 1 [L20] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L26] COND TRUE s__state == 8466 [L59] COND FALSE !(blastFlag == 0) [L62] COND FALSE !(\read(s__hit)) [L65] s__state = 8512 [L19] COND TRUE 1 [L20] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L26] COND FALSE !(s__state == 8466) [L31] COND TRUE s__state == 8512 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...