./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_stack.i --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_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_stack.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/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 a0142cb115f7d1e16772bca3adcba9f1aba5ac12 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 18:13:39,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:13:39,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:13:40,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:13:40,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:13:40,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:13:40,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:13:40,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:13:40,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:13:40,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:13:40,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:13:40,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:13:40,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:13:40,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:13:40,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:13:40,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:13:40,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:13:40,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:13:40,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:13:40,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:13:40,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:13:40,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:13:40,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:13:40,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:13:40,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:13:40,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:13:40,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:13:40,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:13:40,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:13:40,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:13:40,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:13:40,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:13:40,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:13:40,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:13:40,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:13:40,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:13:40,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:13:40,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:13:40,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:13:40,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:13:40,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:13:40,141 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 18:13:40,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:13:40,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:13:40,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:13:40,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:13:40,172 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:13:40,173 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 18:13:40,173 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 18:13:40,174 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 18:13:40,174 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 18:13:40,174 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 18:13:40,175 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 18:13:40,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:13:40,176 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:13:40,176 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 18:13:40,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:13:40,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:13:40,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:13:40,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 18:13:40,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 18:13:40,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 18:13:40,179 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:13:40,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:13:40,180 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 18:13:40,180 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:13:40,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 18:13:40,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:13:40,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:13:40,182 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 18:13:40,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:13:40,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:13:40,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:13:40,184 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 18:13:40,185 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 18:13:40,185 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_a63633a1-7538-49d2-9d24-c6ac0a31f85e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0142cb115f7d1e16772bca3adcba9f1aba5ac12 [2020-11-29 18:13:40,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:13:40,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:13:40,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:13:40,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:13:40,508 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:13:40,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext/tree_stack.i [2020-11-29 18:13:40,626 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/data/1e5a900aa/fac9dd7f2065441596cd85cef54a5a50/FLAG5e0a20c7a [2020-11-29 18:13:41,308 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:13:41,309 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/sv-benchmarks/c/memsafety-ext/tree_stack.i [2020-11-29 18:13:41,340 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/data/1e5a900aa/fac9dd7f2065441596cd85cef54a5a50/FLAG5e0a20c7a [2020-11-29 18:13:41,607 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/data/1e5a900aa/fac9dd7f2065441596cd85cef54a5a50 [2020-11-29 18:13:41,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:13:41,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:13:41,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:13:41,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:13:41,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:13:41,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:13:41" (1/1) ... [2020-11-29 18:13:41,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4a6d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:41, skipping insertion in model container [2020-11-29 18:13:41,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:13:41" (1/1) ... [2020-11-29 18:13:41,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:13:41,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:13:42,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:13:42,260 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:13:42,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:13:42,380 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:13:42,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42 WrapperNode [2020-11-29 18:13:42,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:13:42,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:13:42,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:13:42,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:13:42,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... [2020-11-29 18:13:42,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... [2020-11-29 18:13:42,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:13:42,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:13:42,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:13:42,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:13:42,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... [2020-11-29 18:13:42,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... [2020-11-29 18:13:42,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... [2020-11-29 18:13:42,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... [2020-11-29 18:13:42,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... [2020-11-29 18:13:42,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... [2020-11-29 18:13:42,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... [2020-11-29 18:13:42,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:13:42,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:13:42,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:13:42,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:13:42,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/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 18:13:42,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 18:13:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 18:13:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:13:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 18:13:42,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 18:13:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:13:42,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:13:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:13:43,344 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:13:43,345 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-29 18:13:43,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:13:43 BoogieIcfgContainer [2020-11-29 18:13:43,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:13:43,348 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 18:13:43,348 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 18:13:43,352 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 18:13:43,353 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:13:43,353 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 06:13:41" (1/3) ... [2020-11-29 18:13:43,355 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2edb3565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:13:43, skipping insertion in model container [2020-11-29 18:13:43,355 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:13:43,355 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:42" (2/3) ... [2020-11-29 18:13:43,356 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2edb3565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:13:43, skipping insertion in model container [2020-11-29 18:13:43,356 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:13:43,356 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:13:43" (3/3) ... [2020-11-29 18:13:43,358 INFO L373 chiAutomizerObserver]: Analyzing ICFG tree_stack.i [2020-11-29 18:13:43,409 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 18:13:43,410 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 18:13:43,410 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 18:13:43,410 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:13:43,410 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:13:43,410 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 18:13:43,411 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:13:43,411 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 18:13:43,424 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-29 18:13:43,445 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-29 18:13:43,445 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:13:43,445 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:13:43,452 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 18:13:43,452 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 18:13:43,453 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 18:13:43,453 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-29 18:13:43,455 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-29 18:13:43,455 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:13:43,455 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:13:43,456 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 18:13:43,456 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 18:13:43,477 INFO L794 eck$LassoCheckResult]: Stem: 17#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(13); 14#L-1true havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~malloc23.base, main_#t~malloc23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~mem25.base, main_#t~mem25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~malloc27.base, main_#t~malloc27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 5#L549-2true [2020-11-29 18:13:43,478 INFO L796 eck$LassoCheckResult]: Loop: 5#L549-2true assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 3#L539-2true assume !true; 13#L538-5true call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 12#L544true assume (main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14;havoc main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;call main_#t~malloc15.base, main_#t~malloc15.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc15.base, main_#t~malloc15.offset, main_~n~0.base, main_~n~0.offset, 4);call main_#t~mem16.base, main_#t~mem16.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem16.base, main_#t~mem16.offset, 4);havoc main_#t~mem16.base, main_#t~mem16.offset;call main_#t~mem17.base, main_#t~mem17.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem17.base, 4 + main_#t~mem17.offset, 4);havoc main_#t~mem17.base, main_#t~mem17.offset; 16#L544-2true call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 22#L549true assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 5#L549-2true [2020-11-29 18:13:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-29 18:13:43,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:43,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848838611] [2020-11-29 18:13:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:43,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:43,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:43,727 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:13:43,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:43,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2020-11-29 18:13:43,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:43,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938148330] [2020-11-29 18:13:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:43,785 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 18:13:43,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938148330] [2020-11-29 18:13:43,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:13:43,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 18:13:43,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143833880] [2020-11-29 18:13:43,795 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:13:43,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 18:13:43,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 18:13:43,814 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-29 18:13:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:43,828 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2020-11-29 18:13:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 18:13:43,831 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 29 transitions. [2020-11-29 18:13:43,836 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-29 18:13:43,842 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 17 states and 25 transitions. [2020-11-29 18:13:43,843 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-29 18:13:43,844 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-29 18:13:43,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 25 transitions. [2020-11-29 18:13:43,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 18:13:43,845 INFO L691 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-29 18:13:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 25 transitions. [2020-11-29 18:13:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 18:13:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 18:13:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2020-11-29 18:13:43,882 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-29 18:13:43,883 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-29 18:13:43,883 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 18:13:43,883 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 25 transitions. [2020-11-29 18:13:43,887 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-29 18:13:43,888 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:13:43,888 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:13:43,888 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 18:13:43,889 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:43,889 INFO L794 eck$LassoCheckResult]: Stem: 65#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(13); 63#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~malloc23.base, main_#t~malloc23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~mem25.base, main_#t~mem25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~malloc27.base, main_#t~malloc27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 53#L549-2 [2020-11-29 18:13:43,889 INFO L796 eck$LassoCheckResult]: Loop: 53#L549-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 50#L539-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 51#L538-1 assume main_#t~short9;call main_#t~mem8.base, main_#t~mem8.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4);main_#t~short9 := main_#t~mem8.base != 0 || main_#t~mem8.offset != 0; 52#L538-3 assume !main_#t~short9;havoc main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~mem7.base, main_#t~mem7.offset; 58#L538-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 60#L544 assume (main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14;havoc main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;call main_#t~malloc15.base, main_#t~malloc15.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc15.base, main_#t~malloc15.offset, main_~n~0.base, main_~n~0.offset, 4);call main_#t~mem16.base, main_#t~mem16.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem16.base, main_#t~mem16.offset, 4);havoc main_#t~mem16.base, main_#t~mem16.offset;call main_#t~mem17.base, main_#t~mem17.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem17.base, 4 + main_#t~mem17.offset, 4);havoc main_#t~mem17.base, main_#t~mem17.offset; 61#L544-2 call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 64#L549 assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 53#L549-2 [2020-11-29 18:13:43,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2020-11-29 18:13:43,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:43,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143842419] [2020-11-29 18:13:43,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:43,944 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:43,987 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:43,998 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:13:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:44,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2020-11-29 18:13:44,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:44,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333946777] [2020-11-29 18:13:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:44,182 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 18:13:44,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333946777] [2020-11-29 18:13:44,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:13:44,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:13:44,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585304006] [2020-11-29 18:13:44,184 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:13:44,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:13:44,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:13:44,185 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. cyclomatic complexity: 10 Second operand 5 states. [2020-11-29 18:13:44,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:44,466 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2020-11-29 18:13:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:13:44,467 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 35 transitions. [2020-11-29 18:13:44,469 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-29 18:13:44,471 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 24 states and 35 transitions. [2020-11-29 18:13:44,471 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2020-11-29 18:13:44,471 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2020-11-29 18:13:44,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2020-11-29 18:13:44,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 18:13:44,472 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2020-11-29 18:13:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2020-11-29 18:13:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-11-29 18:13:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 18:13:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2020-11-29 18:13:44,475 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2020-11-29 18:13:44,475 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2020-11-29 18:13:44,476 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 18:13:44,476 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 29 transitions. [2020-11-29 18:13:44,480 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2020-11-29 18:13:44,480 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:13:44,480 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:13:44,482 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 18:13:44,482 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:44,482 INFO L794 eck$LassoCheckResult]: Stem: 118#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(13); 115#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~malloc23.base, main_#t~malloc23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~mem25.base, main_#t~mem25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~malloc27.base, main_#t~malloc27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 105#L549-2 [2020-11-29 18:13:44,482 INFO L796 eck$LassoCheckResult]: Loop: 105#L549-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 101#L539-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 102#L538-1 assume main_#t~short9;call main_#t~mem8.base, main_#t~mem8.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4);main_#t~short9 := main_#t~mem8.base != 0 || main_#t~mem8.offset != 0; 103#L538-3 assume !main_#t~short9;havoc main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~mem7.base, main_#t~mem7.offset; 120#L538-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 112#L544 assume !((main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14);havoc main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset; 113#L544-2 call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 117#L549 assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 105#L549-2 [2020-11-29 18:13:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:44,483 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2020-11-29 18:13:44,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:44,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927161781] [2020-11-29 18:13:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:44,515 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:44,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:44,543 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:13:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:44,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2020-11-29 18:13:44,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:44,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047067037] [2020-11-29 18:13:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:44,569 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:44,584 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:44,589 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:13:44,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:44,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2020-11-29 18:13:44,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:44,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763765401] [2020-11-29 18:13:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:44,697 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 18:13:44,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763765401] [2020-11-29 18:13:44,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:13:44,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:13:44,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049951152] [2020-11-29 18:13:45,217 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-11-29 18:13:45,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:45,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:13:45,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:13:45,299 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. cyclomatic complexity: 11 Second operand 5 states. [2020-11-29 18:13:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:45,586 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2020-11-29 18:13:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:13:45,588 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 46 transitions. [2020-11-29 18:13:45,590 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2020-11-29 18:13:45,591 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 46 transitions. [2020-11-29 18:13:45,591 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2020-11-29 18:13:45,592 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2020-11-29 18:13:45,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 46 transitions. [2020-11-29 18:13:45,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 18:13:45,592 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 46 transitions. [2020-11-29 18:13:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 46 transitions. [2020-11-29 18:13:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-11-29 18:13:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 18:13:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2020-11-29 18:13:45,598 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2020-11-29 18:13:45,599 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2020-11-29 18:13:45,599 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 18:13:45,599 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 39 transitions. [2020-11-29 18:13:45,600 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2020-11-29 18:13:45,600 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:13:45,600 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:13:45,600 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 18:13:45,601 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:45,601 INFO L794 eck$LassoCheckResult]: Stem: 185#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(13); 181#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~malloc23.base, main_#t~malloc23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~mem25.base, main_#t~mem25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~malloc27.base, main_#t~malloc27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 171#L549-2 [2020-11-29 18:13:45,601 INFO L796 eck$LassoCheckResult]: Loop: 171#L549-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 168#L539-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 169#L538-1 assume !main_#t~short9; 170#L538-3 assume !main_#t~short9;havoc main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~mem7.base, main_#t~mem7.offset; 195#L538-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 194#L544 assume !((main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14);havoc main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset; 183#L544-2 call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 184#L549 assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 171#L549-2 [2020-11-29 18:13:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2020-11-29 18:13:45,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:45,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279589301] [2020-11-29 18:13:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:45,621 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:45,630 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:45,640 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:13:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:45,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2020-11-29 18:13:45,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:45,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290581841] [2020-11-29 18:13:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:45,649 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:45,662 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:45,674 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:13:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2020-11-29 18:13:45,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:45,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306811840] [2020-11-29 18:13:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:45,706 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:13:45,726 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:13:45,740 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:13:45,938 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-11-29 18:13:46,509 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2020-11-29 18:13:46,563 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 18:13:46,751 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-29 18:13:46,752 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:46,754 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 18:13:46,754 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:187, output treesize:175 [2020-11-29 18:13:46,951 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-29 18:13:46,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 06:13:46 BoogieIcfgContainer [2020-11-29 18:13:46,992 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 18:13:46,993 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:13:46,993 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:13:46,993 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:13:46,994 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:13:43" (3/4) ... [2020-11-29 18:13:46,996 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 18:13:47,053 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a63633a1-7538-49d2-9d24-c6ac0a31f85e/bin/uautomizer/witness.graphml [2020-11-29 18:13:47,053 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:13:47,055 INFO L168 Benchmark]: Toolchain (without parser) took 5442.40 ms. Allocated memory was 109.1 MB in the beginning and 142.6 MB in the end (delta: 33.6 MB). Free memory was 75.1 MB in the beginning and 105.9 MB in the end (delta: -30.8 MB). Peak memory consumption was 982.5 kB. Max. memory is 16.1 GB. [2020-11-29 18:13:47,056 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory was 31.9 MB in the beginning and 31.9 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:13:47,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 757.06 ms. Allocated memory is still 109.1 MB. Free memory was 74.9 MB in the beginning and 72.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:13:47,057 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.71 ms. Allocated memory is still 109.1 MB. Free memory was 72.7 MB in the beginning and 70.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:13:47,070 INFO L168 Benchmark]: Boogie Preprocessor took 68.91 ms. Allocated memory is still 109.1 MB. Free memory was 70.6 MB in the beginning and 69.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:13:47,071 INFO L168 Benchmark]: RCFGBuilder took 830.40 ms. Allocated memory is still 109.1 MB. Free memory was 69.0 MB in the beginning and 41.8 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-29 18:13:47,072 INFO L168 Benchmark]: BuchiAutomizer took 3644.59 ms. Allocated memory was 109.1 MB in the beginning and 142.6 MB in the end (delta: 33.6 MB). Free memory was 41.8 MB in the beginning and 108.0 MB in the end (delta: -66.3 MB). Peak memory consumption was 33.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:13:47,073 INFO L168 Benchmark]: Witness Printer took 60.08 ms. Allocated memory is still 142.6 MB. Free memory was 108.0 MB in the beginning and 105.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:13:47,079 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory was 31.9 MB in the beginning and 31.9 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 757.06 ms. Allocated memory is still 109.1 MB. Free memory was 74.9 MB in the beginning and 72.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.71 ms. Allocated memory is still 109.1 MB. Free memory was 72.7 MB in the beginning and 70.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.91 ms. Allocated memory is still 109.1 MB. Free memory was 70.6 MB in the beginning and 69.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 830.40 ms. Allocated memory is still 109.1 MB. Free memory was 69.0 MB in the beginning and 41.8 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3644.59 ms. Allocated memory was 109.1 MB in the beginning and 142.6 MB in the end (delta: 33.6 MB). Free memory was 41.8 MB in the beginning and 108.0 MB in the end (delta: -66.3 MB). Peak memory consumption was 33.2 MB. Max. memory is 16.1 GB. * Witness Printer took 60.08 ms. Allocated memory is still 142.6 MB. Free memory was 108.0 MB in the beginning and 105.9 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 3 terminating modules (3 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.3 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 28 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.5s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 2.8s. Construction of modules took 0.3s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 0. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 3. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 68 SDtfs, 29 SDslu, 60 SDs, 0 SdLazy, 100 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT0 conc1 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 536]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1464} State at position 1 is {s=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@57fced04=0, NULL=1465, NULL=1464, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@55d4429c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6f57d19d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6fc72062=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2f4d622=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@41e3fcf5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@346048c8=0, root=1463, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6f2ca941=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1751a297=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6f57d19d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@70d0fd40=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@540eb51b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@e050ec9=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@348a8078=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1751a297=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2af00a5a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@17c3e0f2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2af00a5a=1463, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2f4d622=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6f2ca941=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@346048c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@55d4429c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1014dde7=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@13b1a916=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7a6b4c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@17c3e0f2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3ca71bb4=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3f4b49ba=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@d02b60d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6fc72062=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@9153068=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@716fb6c1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1014dde7=0, n=1463, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@716fb6c1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@16d35a82=26, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3ba8395f=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@57fced04=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@540eb51b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@41e3fcf5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7a6b4c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@d02b60d=0, root=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@3252f43c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@9153068=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3c919b8a=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3f4b49ba=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3ba8395f=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3ca71bb4=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3c919b8a=0, s=0, NULL=1466, n=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@13b1a916=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 536]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L534] root->left = ((void *)0) [L535] root->right = ((void *)0) Loop: [L536] COND TRUE __VERIFIER_nondet_int() [L537] n = root [L538] EXPR n->left [L538] n->left && n->right [L538] COND FALSE !(n->left && n->right) [L544] EXPR n->left [L544] COND FALSE !(!n->left && __VERIFIER_nondet_int()) [L549] EXPR n->right [L549] COND FALSE !(!n->right && __VERIFIER_nondet_int()) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...