./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loops/nec11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/loops/nec11.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 5edcfc0376a9e6be0c706a9b358eb1360b076159 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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 0.2.1-dev-20ed64e [2021-08-27 15:18:05,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 15:18:05,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 15:18:05,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 15:18:05,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 15:18:05,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 15:18:05,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 15:18:05,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 15:18:05,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 15:18:05,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 15:18:05,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 15:18:05,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 15:18:05,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 15:18:05,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 15:18:05,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 15:18:05,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 15:18:05,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 15:18:05,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 15:18:05,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 15:18:05,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 15:18:05,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 15:18:05,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 15:18:05,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 15:18:05,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 15:18:05,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 15:18:05,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 15:18:05,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 15:18:05,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 15:18:05,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 15:18:05,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 15:18:05,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 15:18:05,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 15:18:05,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 15:18:05,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 15:18:05,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 15:18:05,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 15:18:05,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 15:18:05,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 15:18:05,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 15:18:05,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 15:18:05,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 15:18:05,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-27 15:18:05,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 15:18:05,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 15:18:05,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 15:18:05,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 15:18:05,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 15:18:05,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 15:18:05,187 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 15:18:05,187 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 15:18:05,187 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 15:18:05,187 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 15:18:05,188 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 15:18:05,188 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 15:18:05,188 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 15:18:05,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 15:18:05,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 15:18:05,189 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 15:18:05,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 15:18:05,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 15:18:05,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 15:18:05,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 15:18:05,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 15:18:05,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 15:18:05,190 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 15:18:05,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 15:18:05,190 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 15:18:05,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 15:18:05,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 15:18:05,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 15:18:05,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 15:18:05,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 15:18:05,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 15:18:05,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 15:18:05,192 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 15:18:05,192 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5edcfc0376a9e6be0c706a9b358eb1360b076159 [2021-08-27 15:18:05,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 15:18:05,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 15:18:05,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 15:18:05,509 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 15:18:05,510 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 15:18:05,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec11.c [2021-08-27 15:18:05,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0902a2685/1e7e01e8f1c04cccba1cd43753599c76/FLAGd4eae2236 [2021-08-27 15:18:05,842 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 15:18:05,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec11.c [2021-08-27 15:18:05,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0902a2685/1e7e01e8f1c04cccba1cd43753599c76/FLAGd4eae2236 [2021-08-27 15:18:06,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0902a2685/1e7e01e8f1c04cccba1cd43753599c76 [2021-08-27 15:18:06,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 15:18:06,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 15:18:06,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 15:18:06,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 15:18:06,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 15:18:06,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec978a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06, skipping insertion in model container [2021-08-27 15:18:06,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 15:18:06,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 15:18:06,438 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec11.c[317,330] [2021-08-27 15:18:06,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 15:18:06,457 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 15:18:06,464 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec11.c[317,330] [2021-08-27 15:18:06,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 15:18:06,477 INFO L208 MainTranslator]: Completed translation [2021-08-27 15:18:06,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06 WrapperNode [2021-08-27 15:18:06,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 15:18:06,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 15:18:06,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 15:18:06,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 15:18:06,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 15:18:06,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 15:18:06,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 15:18:06,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 15:18:06,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 15:18:06,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 15:18:06,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 15:18:06,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 15:18:06,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (1/1) ... [2021-08-27 15:18:06,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:06,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:06,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:06,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 15:18:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 15:18:06,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 15:18:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 15:18:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 15:18:06,820 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 15:18:06,820 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-27 15:18:06,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:18:06 BoogieIcfgContainer [2021-08-27 15:18:06,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 15:18:06,822 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 15:18:06,822 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 15:18:06,824 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 15:18:06,824 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 15:18:06,824 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 03:18:06" (1/3) ... [2021-08-27 15:18:06,825 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2e3c81d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 03:18:06, skipping insertion in model container [2021-08-27 15:18:06,825 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 15:18:06,825 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:18:06" (2/3) ... [2021-08-27 15:18:06,825 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2e3c81d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 03:18:06, skipping insertion in model container [2021-08-27 15:18:06,825 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 15:18:06,825 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:18:06" (3/3) ... [2021-08-27 15:18:06,826 INFO L389 chiAutomizerObserver]: Analyzing ICFG nec11.c [2021-08-27 15:18:06,912 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 15:18:06,912 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 15:18:06,912 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 15:18:06,912 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 15:18:06,912 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 15:18:06,912 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 15:18:06,912 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 15:18:06,912 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 15:18:06,937 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:06,947 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 15:18:06,948 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:18:06,948 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:18:06,951 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 15:18:06,951 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 15:18:06,951 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 15:18:06,951 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:06,952 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 15:18:06,956 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:18:06,956 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:18:06,957 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 15:18:06,957 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 15:18:06,961 INFO L791 eck$LassoCheckResult]: Stem: 5#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(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 10#L21-2true [2021-08-27 15:18:06,962 INFO L793 eck$LassoCheckResult]: Loop: 10#L21-2true assume !!(0 != main_~c~0 % 256); 9#L23true assume !(4 == main_~len~0); 8#L23-2true assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 10#L21-2true [2021-08-27 15:18:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-08-27 15:18:06,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:06,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729197136] [2021-08-27 15:18:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:06,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:07,081 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:07,120 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash 40876, now seen corresponding path program 1 times [2021-08-27 15:18:07,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:07,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59934013] [2021-08-27 15:18:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:07,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:07,138 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:07,153 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:07,155 INFO L82 PathProgramCache]: Analyzing trace with hash 28699818, now seen corresponding path program 1 times [2021-08-27 15:18:07,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:07,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676500480] [2021-08-27 15:18:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:07,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:07,173 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:07,201 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:07,544 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 15:18:07,544 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 15:18:07,544 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 15:18:07,544 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 15:18:07,544 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 15:18:07,544 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:07,544 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 15:18:07,545 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 15:18:07,545 INFO L133 ssoRankerPreferences]: Filename of dumped script: nec11.c_Iteration1_Lasso [2021-08-27 15:18:07,545 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 15:18:07,545 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 15:18:07,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,573 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,630 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 15:18:07,855 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 15:18:07,858 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 15:18:07,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:07,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:07,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:07,866 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:07,873 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:07,873 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:07,873 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:07,873 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:07,876 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:07,876 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:07,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-27 15:18:07,889 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:07,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:07,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:07,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:07,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:07,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-27 15:18:07,911 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:07,917 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:07,917 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:18:07,918 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:07,918 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:07,918 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:07,918 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:18:07,919 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:18:07,933 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:07,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:07,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:07,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:07,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 15:18:07,956 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:07,962 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:07,963 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:07,963 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:07,963 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:07,965 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:07,965 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:07,973 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:07,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:07,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:07,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 15:18:08,051 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,058 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,058 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,058 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,058 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,060 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,060 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,069 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,086 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 15:18:08,089 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,095 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,096 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,096 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,096 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,098 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,098 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,130 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 15:18:08,151 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,157 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,157 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,157 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,158 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,159 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,159 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,193 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,210 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-27 15:18:08,213 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,219 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,219 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,219 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,219 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,221 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,221 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,230 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-08-27 15:18:08,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 15:18:08,249 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,255 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,255 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,255 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,255 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,257 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,257 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,267 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,283 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 15:18:08,285 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,291 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,291 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,291 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,291 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,293 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,293 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,310 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,327 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 15:18:08,329 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,336 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,336 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,336 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,336 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,338 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,338 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,345 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-08-27 15:18:08,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 15:18:08,365 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,372 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,372 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,372 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,372 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,374 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,374 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,392 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,423 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 15:18:08,425 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,433 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,434 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,434 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,434 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,456 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,456 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,472 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,490 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-08-27 15:18:08,492 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,498 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,499 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,499 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,501 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,501 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,516 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 15:18:08,535 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,542 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,542 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:18:08,542 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,542 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,542 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,543 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:18:08,543 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:18:08,545 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,562 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-27 15:18:08,564 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,570 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,571 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,571 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,571 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,585 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,585 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,600 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,634 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-27 15:18:08,635 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,642 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,642 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:18:08,642 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,642 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,642 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,643 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:18:08,643 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:18:08,658 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,675 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-27 15:18:08,678 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,684 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,685 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:18:08,685 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,685 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,685 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,685 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:18:08,686 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:18:08,700 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,719 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-27 15:18:08,721 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,727 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,727 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 15:18:08,727 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,727 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,727 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,728 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 15:18:08,728 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 15:18:08,743 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 15:18:08,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,759 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-08-27 15:18:08,762 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 15:18:08,768 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 15:18:08,768 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 15:18:08,768 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 15:18:08,768 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 15:18:08,771 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 15:18:08,771 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 15:18:08,786 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 15:18:08,796 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2021-08-27 15:18:08,796 INFO L444 ModelExtractionUtils]: 0 out of 7 variables were initially zero. Simplification set additionally 4 variables to zero. [2021-08-27 15:18:08,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 15:18:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:08,798 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 15:18:08,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-08-27 15:18:08,844 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 15:18:08,873 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2021-08-27 15:18:08,873 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 15:18:08,874 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~len~0) = -2*ULTIMATE.start_main_~len~0 + 7 Supporting invariants [] [2021-08-27 15:18:08,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:08,909 INFO L297 tatePredicateManager]: 7 out of 7 supporting invariants were superfluous and have been removed [2021-08-27 15:18:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:18:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 15:18:08,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:18:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:18:08,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 15:18:08,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:18:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:18:09,010 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 [2021-08-27 15:18:09,011 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,051 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 39 states and 49 transitions. Complement of second has 8 states. [2021-08-27 15:18:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 15:18:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-08-27 15:18:09,054 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 2 letters. Loop has 3 letters. [2021-08-27 15:18:09,054 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:18:09,055 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 5 letters. Loop has 3 letters. [2021-08-27 15:18:09,055 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:18:09,055 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 2 letters. Loop has 6 letters. [2021-08-27 15:18:09,055 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 15:18:09,055 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 49 transitions. [2021-08-27 15:18:09,057 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 15:18:09,059 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 10 states and 13 transitions. [2021-08-27 15:18:09,060 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-08-27 15:18:09,060 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-27 15:18:09,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2021-08-27 15:18:09,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 15:18:09,060 INFO L681 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2021-08-27 15:18:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2021-08-27 15:18:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-27 15:18:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2021-08-27 15:18:09,075 INFO L704 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2021-08-27 15:18:09,075 INFO L587 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2021-08-27 15:18:09,075 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 15:18:09,075 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2021-08-27 15:18:09,076 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 15:18:09,076 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:18:09,076 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:18:09,076 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-08-27 15:18:09,076 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 15:18:09,076 INFO L791 eck$LassoCheckResult]: Stem: 122#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(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 123#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 130#L21-2 assume !!(0 != main_~c~0 % 256); 128#L23 assume 4 == main_~len~0;main_~len~0 := 0; 124#L23-2 [2021-08-27 15:18:09,076 INFO L793 eck$LassoCheckResult]: Loop: 124#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 125#L21-2 assume !!(0 != main_~c~0 % 256); 131#L23 assume !(4 == main_~len~0); 124#L23-2 [2021-08-27 15:18:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-08-27 15:18:09,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364269962] [2021-08-27 15:18:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:18:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:18:09,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 15:18:09,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364269962] [2021-08-27 15:18:09,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364269962] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 15:18:09,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 15:18:09,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 15:18:09,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320675973] [2021-08-27 15:18:09,110 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 15:18:09,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,110 INFO L82 PathProgramCache]: Analyzing trace with hash 47446, now seen corresponding path program 2 times [2021-08-27 15:18:09,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110412223] [2021-08-27 15:18:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,113 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,116 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:09,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 15:18:09,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 15:18:09,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 15:18:09,148 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. cyclomatic complexity: 5 Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 15:18:09,155 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-08-27 15:18:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 15:18:09,155 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 16 transitions. [2021-08-27 15:18:09,156 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 15:18:09,156 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 13 states and 15 transitions. [2021-08-27 15:18:09,156 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-08-27 15:18:09,156 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-08-27 15:18:09,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2021-08-27 15:18:09,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 15:18:09,156 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-08-27 15:18:09,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2021-08-27 15:18:09,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2021-08-27 15:18:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-08-27 15:18:09,157 INFO L704 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-08-27 15:18:09,157 INFO L587 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-08-27 15:18:09,157 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 15:18:09,157 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 12 transitions. [2021-08-27 15:18:09,158 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 15:18:09,158 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:18:09,158 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:18:09,158 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2021-08-27 15:18:09,158 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 15:18:09,158 INFO L791 eck$LassoCheckResult]: Stem: 152#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 153#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 161#L21-2 assume !!(0 != main_~c~0 % 256); 159#L23 assume !(4 == main_~len~0); 156#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 157#L21-2 assume !!(0 != main_~c~0 % 256); 158#L23 assume 4 == main_~len~0;main_~len~0 := 0; 154#L23-2 [2021-08-27 15:18:09,158 INFO L793 eck$LassoCheckResult]: Loop: 154#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 155#L21-2 assume !!(0 != main_~c~0 % 256); 160#L23 assume !(4 == main_~len~0); 154#L23-2 [2021-08-27 15:18:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1810721677, now seen corresponding path program 1 times [2021-08-27 15:18:09,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218584461] [2021-08-27 15:18:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:18:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:18:09,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 15:18:09,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218584461] [2021-08-27 15:18:09,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218584461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 15:18:09,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336454275] [2021-08-27 15:18:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 15:18:09,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:09,183 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 15:18:09,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 15:18:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:18:09,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 15:18:09,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:18:09,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:18:09,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336454275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 15:18:09,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 15:18:09,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-27 15:18:09,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5611328] [2021-08-27 15:18:09,272 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 15:18:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,272 INFO L82 PathProgramCache]: Analyzing trace with hash 47446, now seen corresponding path program 3 times [2021-08-27 15:18:09,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759624039] [2021-08-27 15:18:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,275 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,284 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:09,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 15:18:09,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 15:18:09,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-27 15:18:09,329 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. cyclomatic complexity: 4 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 15:18:09,343 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-08-27 15:18:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 15:18:09,343 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 22 transitions. [2021-08-27 15:18:09,344 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-08-27 15:18:09,344 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 19 states and 21 transitions. [2021-08-27 15:18:09,344 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-08-27 15:18:09,345 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-08-27 15:18:09,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2021-08-27 15:18:09,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 15:18:09,345 INFO L681 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-27 15:18:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2021-08-27 15:18:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-08-27 15:18:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-27 15:18:09,347 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-27 15:18:09,347 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-27 15:18:09,347 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 15:18:09,347 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 18 transitions. [2021-08-27 15:18:09,347 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-08-27 15:18:09,347 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:18:09,347 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:18:09,348 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1] [2021-08-27 15:18:09,348 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1] [2021-08-27 15:18:09,348 INFO L791 eck$LassoCheckResult]: Stem: 208#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(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 209#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 218#L21-2 assume !!(0 != main_~c~0 % 256); 219#L23 assume !(4 == main_~len~0); 220#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 217#L21-2 assume !!(0 != main_~c~0 % 256); 215#L23 assume !(4 == main_~len~0); 212#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 213#L21-2 assume !!(0 != main_~c~0 % 256); 214#L23 assume 4 == main_~len~0;main_~len~0 := 0; 210#L23-2 [2021-08-27 15:18:09,348 INFO L793 eck$LassoCheckResult]: Loop: 210#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 211#L21-2 assume !!(0 != main_~c~0 % 256); 216#L23 assume !(4 == main_~len~0); 221#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 223#L21-2 assume !!(0 != main_~c~0 % 256); 222#L23 assume 4 == main_~len~0;main_~len~0 := 0; 210#L23-2 [2021-08-27 15:18:09,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1579681018, now seen corresponding path program 2 times [2021-08-27 15:18:09,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86195535] [2021-08-27 15:18:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:18:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:18:09,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 15:18:09,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86195535] [2021-08-27 15:18:09,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86195535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 15:18:09,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829601231] [2021-08-27 15:18:09,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 15:18:09,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 15:18:09,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:09,380 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 15:18:09,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 15:18:09,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 15:18:09,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 15:18:09,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 15:18:09,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:18:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:18:09,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829601231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 15:18:09,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 15:18:09,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-27 15:18:09,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721550332] [2021-08-27 15:18:09,470 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 15:18:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1413481439, now seen corresponding path program 1 times [2021-08-27 15:18:09,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697127609] [2021-08-27 15:18:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,475 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,478 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:09,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 15:18:09,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 15:18:09,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-27 15:18:09,525 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. cyclomatic complexity: 4 Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 15:18:09,549 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-08-27 15:18:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 15:18:09,549 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 28 transitions. [2021-08-27 15:18:09,550 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-08-27 15:18:09,550 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 25 states and 27 transitions. [2021-08-27 15:18:09,550 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2021-08-27 15:18:09,551 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2021-08-27 15:18:09,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 27 transitions. [2021-08-27 15:18:09,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 15:18:09,551 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-08-27 15:18:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 27 transitions. [2021-08-27 15:18:09,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-08-27 15:18:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-08-27 15:18:09,553 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-27 15:18:09,553 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-27 15:18:09,553 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 15:18:09,553 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 24 transitions. [2021-08-27 15:18:09,554 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-08-27 15:18:09,554 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:18:09,554 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:18:09,554 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 1, 1, 1] [2021-08-27 15:18:09,554 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 3, 2, 1] [2021-08-27 15:18:09,555 INFO L791 eck$LassoCheckResult]: Stem: 286#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 287#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 297#L21-2 assume !!(0 != main_~c~0 % 256); 298#L23 assume !(4 == main_~len~0); 302#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 296#L21-2 assume !!(0 != main_~c~0 % 256); 294#L23 assume !(4 == main_~len~0); 290#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 291#L21-2 assume !!(0 != main_~c~0 % 256); 300#L23 assume !(4 == main_~len~0); 301#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 299#L21-2 assume !!(0 != main_~c~0 % 256); 292#L23 assume 4 == main_~len~0;main_~len~0 := 0; 293#L23-2 [2021-08-27 15:18:09,555 INFO L793 eck$LassoCheckResult]: Loop: 293#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 307#L21-2 assume !!(0 != main_~c~0 % 256); 303#L23 assume !(4 == main_~len~0); 288#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 289#L21-2 assume !!(0 != main_~c~0 % 256); 295#L23 assume !(4 == main_~len~0); 305#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 306#L21-2 assume !!(0 != main_~c~0 % 256); 304#L23 assume 4 == main_~len~0;main_~len~0 := 0; 293#L23-2 [2021-08-27 15:18:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash -320467731, now seen corresponding path program 3 times [2021-08-27 15:18:09,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528467523] [2021-08-27 15:18:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 15:18:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:18:09,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 15:18:09,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528467523] [2021-08-27 15:18:09,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528467523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 15:18:09,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485655249] [2021-08-27 15:18:09,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 15:18:09,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 15:18:09,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 15:18:09,617 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 15:18:09,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 15:18:09,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 15:18:09,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 15:18:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 15:18:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 15:18:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 15:18:09,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485655249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 15:18:09,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 15:18:09,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-27 15:18:09,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70636708] [2021-08-27 15:18:09,720 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 15:18:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1166256500, now seen corresponding path program 2 times [2021-08-27 15:18:09,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586560125] [2021-08-27 15:18:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,725 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,729 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:09,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 15:18:09,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 15:18:09,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-27 15:18:09,784 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. cyclomatic complexity: 4 Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 15:18:09,801 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-08-27 15:18:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 15:18:09,803 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 34 transitions. [2021-08-27 15:18:09,804 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2021-08-27 15:18:09,804 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 31 states and 33 transitions. [2021-08-27 15:18:09,805 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-08-27 15:18:09,805 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-08-27 15:18:09,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 33 transitions. [2021-08-27 15:18:09,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 15:18:09,805 INFO L681 BuchiCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-08-27 15:18:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 33 transitions. [2021-08-27 15:18:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-08-27 15:18:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 15:18:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-27 15:18:09,807 INFO L704 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-27 15:18:09,807 INFO L587 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-27 15:18:09,807 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-08-27 15:18:09,807 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 30 transitions. [2021-08-27 15:18:09,808 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-08-27 15:18:09,808 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 15:18:09,808 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 15:18:09,808 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 1, 1, 1] [2021-08-27 15:18:09,808 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1] [2021-08-27 15:18:09,809 INFO L791 eck$LassoCheckResult]: Stem: 386#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(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 387#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~post8, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~i~0; 397#L21-2 assume !!(0 != main_~c~0 % 256); 394#L23 assume !(4 == main_~len~0); 390#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 391#L21-2 assume !!(0 != main_~c~0 % 256); 396#L23 assume !(4 == main_~len~0); 405#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 404#L21-2 assume !!(0 != main_~c~0 % 256); 403#L23 assume !(4 == main_~len~0); 402#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 401#L21-2 assume !!(0 != main_~c~0 % 256); 399#L23 assume !(4 == main_~len~0); 400#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 398#L21-2 assume !!(0 != main_~c~0 % 256); 392#L23 assume 4 == main_~len~0;main_~len~0 := 0; 393#L23-2 [2021-08-27 15:18:09,809 INFO L793 eck$LassoCheckResult]: Loop: 393#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 413#L21-2 assume !!(0 != main_~c~0 % 256); 406#L23 assume !(4 == main_~len~0); 388#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 389#L21-2 assume !!(0 != main_~c~0 % 256); 395#L23 assume !(4 == main_~len~0); 412#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 411#L21-2 assume !!(0 != main_~c~0 % 256); 410#L23 assume !(4 == main_~len~0); 408#L23-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post8 := main_~len~0;main_~len~0 := 1 + main_#t~post8;havoc main_#t~post8; 409#L21-2 assume !!(0 != main_~c~0 % 256); 407#L23 assume 4 == main_~len~0;main_~len~0 := 0; 393#L23-2 [2021-08-27 15:18:09,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash 658202022, now seen corresponding path program 4 times [2021-08-27 15:18:09,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251976516] [2021-08-27 15:18:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,816 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,824 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1957011391, now seen corresponding path program 3 times [2021-08-27 15:18:09,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459515229] [2021-08-27 15:18:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,828 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,832 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 15:18:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash -282022428, now seen corresponding path program 5 times [2021-08-27 15:18:09,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 15:18:09,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185649449] [2021-08-27 15:18:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 15:18:09,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 15:18:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,843 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 15:18:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 15:18:09,854 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 15:18:10,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-08-27 15:18:10,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 03:18:10 BoogieIcfgContainer [2021-08-27 15:18:10,288 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 15:18:10,289 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 15:18:10,289 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 15:18:10,289 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 15:18:10,289 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:18:06" (3/4) ... [2021-08-27 15:18:10,290 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-08-27 15:18:10,310 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 15:18:10,310 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 15:18:10,311 INFO L168 Benchmark]: Toolchain (without parser) took 3996.81 ms. Allocated memory was 60.8 MB in the beginning and 123.7 MB in the end (delta: 62.9 MB). Free memory was 40.1 MB in the beginning and 62.0 MB in the end (delta: -21.9 MB). Peak memory consumption was 40.3 MB. Max. memory is 16.1 GB. [2021-08-27 15:18:10,311 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 43.0 MB in the end (delta: 43.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 15:18:10,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.62 ms. Allocated memory is still 60.8 MB. Free memory was 39.8 MB in the beginning and 30.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 15:18:10,312 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.58 ms. Allocated memory is still 60.8 MB. Free memory was 30.6 MB in the beginning and 44.4 MB in the end (delta: -13.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 15:18:10,312 INFO L168 Benchmark]: Boogie Preprocessor took 25.81 ms. Allocated memory is still 60.8 MB. Free memory was 44.4 MB in the beginning and 43.6 MB in the end (delta: 867.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 15:18:10,312 INFO L168 Benchmark]: RCFGBuilder took 268.26 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 32.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-27 15:18:10,312 INFO L168 Benchmark]: BuchiAutomizer took 3466.53 ms. Allocated memory was 60.8 MB in the beginning and 123.7 MB in the end (delta: 62.9 MB). Free memory was 32.0 MB in the beginning and 64.0 MB in the end (delta: -32.1 MB). Peak memory consumption was 52.0 MB. Max. memory is 16.1 GB. [2021-08-27 15:18:10,313 INFO L168 Benchmark]: Witness Printer took 21.61 ms. Allocated memory is still 123.7 MB. Free memory was 64.0 MB in the beginning and 62.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 15:18:10,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 43.0 MB in the end (delta: 43.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 161.62 ms. Allocated memory is still 60.8 MB. Free memory was 39.8 MB in the beginning and 30.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.58 ms. Allocated memory is still 60.8 MB. Free memory was 30.6 MB in the beginning and 44.4 MB in the end (delta: -13.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.81 ms. Allocated memory is still 60.8 MB. Free memory was 44.4 MB in the beginning and 43.6 MB in the end (delta: 867.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 268.26 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 32.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3466.53 ms. Allocated memory was 60.8 MB in the beginning and 123.7 MB in the end (delta: 62.9 MB). Free memory was 32.0 MB in the beginning and 64.0 MB in the end (delta: -32.1 MB). Peak memory consumption was 52.0 MB. Max. memory is 16.1 GB. * Witness Printer took 21.61 ms. Allocated memory is still 123.7 MB. Free memory was 64.0 MB in the beginning and 62.0 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 5 terminating modules (4 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function 7 + -2 * len and consists of 5 locations. 4 modules have a trivial ranking function, the largest among these consists of 7 locations. The remainder module has 28 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.4s and 6 iterations. TraceHistogramMax:5. Analysis of lassos took 3.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 5. Automata minimization 13.1ms AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 5. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 25 SDtfs, 20 SDslu, 33 SDs, 0 SdLazy, 41 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.3ms Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU4 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital135 mio100 ax100 hnf100 lsp68 ukn47 mio100 lsp43 div236 bol100 ite100 ukn100 eq144 hnf49 smp78 dnf100 smp100 tf100 neg95 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 30ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: 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: 21]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=28888} State at position 1 is {NULL=0, NULL=0, NULL=0, NULL=28891, NULL=0, \result=0, NULL=28890, c=257, NULL=28888, i=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@67cba399=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@ba0c4da=0, NULL=0, len=0, NULL=28889} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 23]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L15] int a[5]; [L16] int len=0; [L17] _Bool c=__VERIFIER_nondet_bool(); [L18] int i; [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND TRUE len==4 [L24] len =0 Loop: [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND FALSE !(len==4) [L26] EXPR a[len] [L26] a[len]=0 [L28] len++ [L21] COND TRUE \read(c) [L23] COND TRUE len==4 [L24] len =0 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-08-27 15:18:10,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:10,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:10,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 15:18:10,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...