./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrnlen-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/termination-memory-alloca/openbsd_cstrnlen-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-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 64bit --witnessprinter.graph.data.programhash 20d74f4d70a20b55179c45eafbef37cbb7fed804 ....................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 20:34:47,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:34:47,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:34:47,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:34:47,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:34:47,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:34:47,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:34:47,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:34:47,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:34:47,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:34:47,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:34:47,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:34:47,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:34:47,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:34:47,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:34:47,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:34:47,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:34:47,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:34:47,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:34:47,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:34:47,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:34:47,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:34:47,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:34:47,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:34:47,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:34:47,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:34:47,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:34:47,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:34:47,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:34:47,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:34:47,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:34:47,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:34:47,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:34:47,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:34:47,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:34:47,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:34:47,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:34:47,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:34:47,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:34:47,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:34:47,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:34:47,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 20:34:47,602 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:34:47,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:34:47,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:34:47,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:34:47,606 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:34:47,606 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 20:34:47,607 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 20:34:47,607 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 20:34:47,607 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 20:34:47,608 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 20:34:47,609 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 20:34:47,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:34:47,610 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:34:47,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:34:47,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:34:47,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 20:34:47,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 20:34:47,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 20:34:47,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 20:34:47,612 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 20:34:47,612 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:34:47,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 20:34:47,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:34:47,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:34:47,614 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 20:34:47,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:34:47,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:34:47,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:34:47,615 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 20:34:47,616 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 20:34:47,616 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20d74f4d70a20b55179c45eafbef37cbb7fed804 [2019-11-28 20:34:47,940 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:34:47,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:34:47,966 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:34:47,967 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:34:47,969 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:34:47,970 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrnlen-alloca-2.i [2019-11-28 20:34:48,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38687b039/b7019b163a4445c5ab3cea4dfa099b51/FLAG2d04b574a [2019-11-28 20:34:48,579 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:34:48,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrnlen-alloca-2.i [2019-11-28 20:34:48,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38687b039/b7019b163a4445c5ab3cea4dfa099b51/FLAG2d04b574a [2019-11-28 20:34:48,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38687b039/b7019b163a4445c5ab3cea4dfa099b51 [2019-11-28 20:34:48,919 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:34:48,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 20:34:48,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:34:48,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:34:48,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:34:48,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:34:48" (1/1) ... [2019-11-28 20:34:48,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce65fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:48, skipping insertion in model container [2019-11-28 20:34:48,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:34:48" (1/1) ... [2019-11-28 20:34:48,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:34:48,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:34:49,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:34:49,416 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:34:49,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:34:49,515 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:34:49,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49 WrapperNode [2019-11-28 20:34:49,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:34:49,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 20:34:49,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 20:34:49,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 20:34:49,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... [2019-11-28 20:34:49,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... [2019-11-28 20:34:49,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 20:34:49,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:34:49,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:34:49,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:34:49,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... [2019-11-28 20:34:49,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... [2019-11-28 20:34:49,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... [2019-11-28 20:34:49,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... [2019-11-28 20:34:49,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... [2019-11-28 20:34:49,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... [2019-11-28 20:34:49,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... [2019-11-28 20:34:49,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:34:49,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:34:49,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:34:49,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:34:49,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:34:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 20:34:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 20:34:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 20:34:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 20:34:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:34:49,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:34:49,993 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:34:49,993 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 20:34:49,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:34:49 BoogieIcfgContainer [2019-11-28 20:34:49,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:34:49,996 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 20:34:49,996 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 20:34:50,000 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 20:34:50,001 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:34:50,001 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 08:34:48" (1/3) ... [2019-11-28 20:34:50,003 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@67d11f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:34:50, skipping insertion in model container [2019-11-28 20:34:50,003 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:34:50,003 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:49" (2/3) ... [2019-11-28 20:34:50,004 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@67d11f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:34:50, skipping insertion in model container [2019-11-28 20:34:50,004 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:34:50,004 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:34:49" (3/3) ... [2019-11-28 20:34:50,006 INFO L371 chiAutomizerObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-2.i [2019-11-28 20:34:50,046 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 20:34:50,047 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 20:34:50,047 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 20:34:50,047 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:34:50,048 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:34:50,048 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 20:34:50,048 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:34:50,048 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 20:34:50,061 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-11-28 20:34:50,081 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-28 20:34:50,082 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:34:50,082 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:34:50,087 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2019-11-28 20:34:50,088 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 20:34:50,088 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 20:34:50,088 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-11-28 20:34:50,090 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-28 20:34:50,090 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:34:50,090 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:34:50,090 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2019-11-28 20:34:50,091 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 20:34:50,097 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 10#L-1true havoc main_#res;havoc main_#t~nondet6, main_#t~nondet7, main_#t~malloc8.base, main_#t~malloc8.offset, main_#t~ret9, main_~length1~0, main_~n~0, main_~nondetString1~0.base, main_~nondetString1~0.offset;main_~length1~0 := main_#t~nondet6;havoc main_#t~nondet6;main_~n~0 := main_#t~nondet7;havoc main_#t~nondet7; 4#L558true assume !(main_~length1~0 < 1); 6#L558-2true assume !(main_~n~0 < 1); 15#L561-1true call main_#t~malloc8.base, main_#t~malloc8.offset := #Ultimate.allocOnStack(main_~length1~0);main_~nondetString1~0.base, main_~nondetString1~0.offset := main_#t~malloc8.base, main_#t~malloc8.offset;call write~int(0, main_~nondetString1~0.base, main_~nondetString1~0.offset + (main_~length1~0 - 1), 1);cstrnlen_#in~str.base, cstrnlen_#in~str.offset, cstrnlen_#in~maxlen := main_~nondetString1~0.base, main_~nondetString1~0.offset, main_~n~0;havoc cstrnlen_#res;havoc cstrnlen_#t~post2.base, cstrnlen_#t~post2.offset, cstrnlen_#t~post3, cstrnlen_#t~mem4, cstrnlen_#t~short5, cstrnlen_~str.base, cstrnlen_~str.offset, cstrnlen_~maxlen, cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset;cstrnlen_~str.base, cstrnlen_~str.offset := cstrnlen_#in~str.base, cstrnlen_#in~str.offset;cstrnlen_~maxlen := cstrnlen_#in~maxlen;havoc cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset;cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset := cstrnlen_~str.base, cstrnlen_~str.offset; 7#L551-6true [2019-11-28 20:34:50,097 INFO L796 eck$LassoCheckResult]: Loop: 7#L551-6true cstrnlen_#t~short5 := 0 != cstrnlen_~maxlen % 4294967296; 14#L551-1true assume cstrnlen_#t~short5;call cstrnlen_#t~mem4 := read~int(cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset, 1);cstrnlen_#t~short5 := 0 != cstrnlen_#t~mem4; 3#L551-3true assume !!cstrnlen_#t~short5;havoc cstrnlen_#t~short5;havoc cstrnlen_#t~mem4; 5#L551-5true cstrnlen_#t~post2.base, cstrnlen_#t~post2.offset := cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset;cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset := cstrnlen_#t~post2.base, 1 + cstrnlen_#t~post2.offset;havoc cstrnlen_#t~post2.base, cstrnlen_#t~post2.offset;cstrnlen_#t~post3 := cstrnlen_~maxlen;cstrnlen_~maxlen := cstrnlen_#t~post3 - 1;havoc cstrnlen_#t~post3; 7#L551-6true [2019-11-28 20:34:50,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:34:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash 28695878, now seen corresponding path program 1 times [2019-11-28 20:34:50,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:34:50,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787146677] [2019-11-28 20:34:50,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:34:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:34:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:34:50,272 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:34:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:34:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1511654, now seen corresponding path program 1 times [2019-11-28 20:34:50,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:34:50,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693338555] [2019-11-28 20:34:50,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:34:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:34:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:34:50,317 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:34:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:34:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1298318251, now seen corresponding path program 1 times [2019-11-28 20:34:50,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:34:50,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704118107] [2019-11-28 20:34:50,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:34:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:34:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:34:50,411 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:34:50,549 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2019-11-28 20:34:50,832 WARN L192 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-11-28 20:34:50,930 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:34:50,931 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:34:50,932 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:34:50,932 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:34:50,932 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:34:50,932 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:34:50,932 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:34:50,933 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:34:50,933 INFO L133 ssoRankerPreferences]: Filename of dumped script: openbsd_cstrnlen-alloca-2.i_Iteration1_Lasso [2019-11-28 20:34:50,933 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:34:50,933 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:34:50,965 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,153 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2019-11-28 20:34:51,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:34:51,766 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:34:51,771 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:34:51,785 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:34:51,788 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:34:51,789 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:34:51,789 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:34:51,789 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:34:51,805 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:34:51,805 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:34:51,822 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:34:51,945 INFO L443 ModelExtractionUtils]: Simplification made 11 calls to the SMT solver. [2019-11-28 20:34:51,945 INFO L444 ModelExtractionUtils]: 6 out of 28 variables were initially zero. Simplification set additionally 19 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:34:52,015 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:34:52,035 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2019-11-28 20:34:52,036 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:34:52,037 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_cstrnlen_~cp~0.offset, v_rep(select #length ULTIMATE.start_main_#t~malloc8.base)_1) = -1*ULTIMATE.start_cstrnlen_~cp~0.offset + 1*v_rep(select #length ULTIMATE.start_main_#t~malloc8.base)_1 Supporting invariants [] [2019-11-28 20:34:52,058 INFO L297 tatePredicateManager]: 3 out of 4 supporting invariants were superfluous and have been removed [2019-11-28 20:34:52,069 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2019-11-28 20:34:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:34:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:34:52,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 20:34:52,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:34:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:34:52,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 20:34:52,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:34:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:34:52,199 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-28 20:34:52,200 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 4 states. [2019-11-28 20:34:52,289 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 4 states. Result 36 states and 45 transitions. Complement of second has 8 states. [2019-11-28 20:34:52,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 20:34:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 20:34:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2019-11-28 20:34:52,294 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 5 letters. Loop has 4 letters. [2019-11-28 20:34:52,295 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:34:52,296 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 9 letters. Loop has 4 letters. [2019-11-28 20:34:52,296 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:34:52,296 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 5 letters. Loop has 8 letters. [2019-11-28 20:34:52,297 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:34:52,298 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 45 transitions. [2019-11-28 20:34:52,300 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-28 20:34:52,305 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 18 states and 23 transitions. [2019-11-28 20:34:52,306 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2019-11-28 20:34:52,306 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2019-11-28 20:34:52,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 23 transitions. [2019-11-28 20:34:52,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:34:52,307 INFO L688 BuchiCegarLoop]: Abstraction has 18 states and 23 transitions. [2019-11-28 20:34:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 23 transitions. [2019-11-28 20:34:52,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-28 20:34:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 20:34:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2019-11-28 20:34:52,337 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2019-11-28 20:34:52,337 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2019-11-28 20:34:52,337 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 20:34:52,337 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 22 transitions. [2019-11-28 20:34:52,338 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-28 20:34:52,338 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:34:52,338 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:34:52,339 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2019-11-28 20:34:52,339 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 20:34:52,339 INFO L794 eck$LassoCheckResult]: Stem: 133#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 130#L-1 havoc main_#res;havoc main_#t~nondet6, main_#t~nondet7, main_#t~malloc8.base, main_#t~malloc8.offset, main_#t~ret9, main_~length1~0, main_~n~0, main_~nondetString1~0.base, main_~nondetString1~0.offset;main_~length1~0 := main_#t~nondet6;havoc main_#t~nondet6;main_~n~0 := main_#t~nondet7;havoc main_#t~nondet7; 131#L558 assume !(main_~length1~0 < 1); 132#L558-2 assume !(main_~n~0 < 1); 136#L561-1 call main_#t~malloc8.base, main_#t~malloc8.offset := #Ultimate.allocOnStack(main_~length1~0);main_~nondetString1~0.base, main_~nondetString1~0.offset := main_#t~malloc8.base, main_#t~malloc8.offset;call write~int(0, main_~nondetString1~0.base, main_~nondetString1~0.offset + (main_~length1~0 - 1), 1);cstrnlen_#in~str.base, cstrnlen_#in~str.offset, cstrnlen_#in~maxlen := main_~nondetString1~0.base, main_~nondetString1~0.offset, main_~n~0;havoc cstrnlen_#res;havoc cstrnlen_#t~post2.base, cstrnlen_#t~post2.offset, cstrnlen_#t~post3, cstrnlen_#t~mem4, cstrnlen_#t~short5, cstrnlen_~str.base, cstrnlen_~str.offset, cstrnlen_~maxlen, cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset;cstrnlen_~str.base, cstrnlen_~str.offset := cstrnlen_#in~str.base, cstrnlen_#in~str.offset;cstrnlen_~maxlen := cstrnlen_#in~maxlen;havoc cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset;cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset := cstrnlen_~str.base, cstrnlen_~str.offset; 141#L551-6 cstrnlen_#t~short5 := 0 != cstrnlen_~maxlen % 4294967296; 137#L551-1 [2019-11-28 20:34:52,339 INFO L796 eck$LassoCheckResult]: Loop: 137#L551-1 assume !cstrnlen_#t~short5; 126#L551-3 assume !!cstrnlen_#t~short5;havoc cstrnlen_#t~short5;havoc cstrnlen_#t~mem4; 127#L551-5 cstrnlen_#t~post2.base, cstrnlen_#t~post2.offset := cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset;cstrnlen_~cp~0.base, cstrnlen_~cp~0.offset := cstrnlen_#t~post2.base, 1 + cstrnlen_#t~post2.offset;havoc cstrnlen_#t~post2.base, cstrnlen_#t~post2.offset;cstrnlen_#t~post3 := cstrnlen_~maxlen;cstrnlen_~maxlen := cstrnlen_#t~post3 - 1;havoc cstrnlen_#t~post3; 134#L551-6 cstrnlen_#t~short5 := 0 != cstrnlen_~maxlen % 4294967296; 137#L551-1 [2019-11-28 20:34:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:34:52,340 INFO L82 PathProgramCache]: Analyzing trace with hash 889572237, now seen corresponding path program 1 times [2019-11-28 20:34:52,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:34:52,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174281494] [2019-11-28 20:34:52,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:34:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:34:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:34:52,385 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:34:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:34:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346, now seen corresponding path program 1 times [2019-11-28 20:34:52,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:34:52,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988521501] [2019-11-28 20:34:52,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:34:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:34:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:34:52,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988521501] [2019-11-28 20:34:52,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:34:52,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 20:34:52,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309340043] [2019-11-28 20:34:52,432 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 20:34:52,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:34:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 20:34:52,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 20:34:52,437 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. cyclomatic complexity: 7 Second operand 3 states. [2019-11-28 20:34:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:34:52,451 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2019-11-28 20:34:52,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 20:34:52,452 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2019-11-28 20:34:52,453 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:34:52,453 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 0 states and 0 transitions. [2019-11-28 20:34:52,453 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 20:34:52,453 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 20:34:52,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 20:34:52,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 20:34:52,453 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:34:52,454 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:34:52,454 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:34:52,454 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 20:34:52,454 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 20:34:52,454 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:34:52,454 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 20:34:52,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 08:34:52 BoogieIcfgContainer [2019-11-28 20:34:52,461 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 20:34:52,462 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:34:52,462 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:34:52,462 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:34:52,463 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:34:49" (3/4) ... [2019-11-28 20:34:52,466 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 20:34:52,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:34:52,468 INFO L168 Benchmark]: Toolchain (without parser) took 3547.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 957.7 MB in the beginning and 866.7 MB in the end (delta: 91.0 MB). Peak memory consumption was 228.3 MB. Max. memory is 11.5 GB. [2019-11-28 20:34:52,469 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:34:52,470 INFO L168 Benchmark]: CACSL2BoogieTranslator took 595.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -166.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2019-11-28 20:34:52,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:34:52,472 INFO L168 Benchmark]: Boogie Preprocessor took 27.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:34:52,473 INFO L168 Benchmark]: RCFGBuilder took 399.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-11-28 20:34:52,473 INFO L168 Benchmark]: BuchiAutomizer took 2465.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 866.7 MB in the end (delta: 227.2 MB). Peak memory consumption was 227.2 MB. Max. memory is 11.5 GB. [2019-11-28 20:34:52,474 INFO L168 Benchmark]: Witness Printer took 4.56 ms. Allocated memory is still 1.2 GB. Free memory is still 866.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:34:52,478 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 595.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -166.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 48.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 399.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2465.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 866.7 MB in the end (delta: 227.2 MB). Peak memory consumption was 227.2 MB. Max. memory is 11.5 GB. * Witness Printer took 4.56 ms. Allocated memory is still 1.2 GB. Free memory is still 866.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #length * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * cp + unknown-#length-unknown[__builtin_alloca (length1 * sizeof(char))] and consists of 5 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.4s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 2.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 17 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 23 SDtfs, 18 SDslu, 15 SDs, 0 SdLazy, 15 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital134 mio100 ax113 hnf98 lsp70 ukn91 mio100 lsp46 div131 bol100 ite100 ukn100 eq157 hnf82 smp100 dnf100 smp100 tf100 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 263ms VariablesStem: 8 VariablesLoop: 5 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...