./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/loops/invert_string_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loops/invert_string_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60adf12976c621166b8ffd5e872004e7d6c30802 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/config using search string *Termination*32bit*_Bitvector*.epf No suitable settings file found using Termination*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: MapEliminator tries to combine Int and (Array Int Int) --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 11:59:16,628 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 11:59:16,629 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 11:59:16,636 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 11:59:16,637 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 11:59:16,637 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 11:59:16,638 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 11:59:16,640 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 11:59:16,641 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 11:59:16,641 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 11:59:16,642 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 11:59:16,642 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 11:59:16,643 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 11:59:16,643 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 11:59:16,644 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 11:59:16,644 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 11:59:16,645 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 11:59:16,646 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 11:59:16,647 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 11:59:16,648 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 11:59:16,649 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 11:59:16,649 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 11:59:16,650 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 11:59:16,650 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 11:59:16,651 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 11:59:16,651 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 11:59:16,652 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 11:59:16,653 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 11:59:16,653 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 11:59:16,654 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 11:59:16,654 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 11:59:16,654 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 11:59:16,655 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 11:59:16,655 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 11:59:16,655 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 11:59:16,656 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 11:59:16,656 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-28 11:59:16,664 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 11:59:16,664 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 11:59:16,665 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 11:59:16,665 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 11:59:16,665 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 11:59:16,665 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-28 11:59:16,665 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-28 11:59:16,666 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-28 11:59:16,666 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-28 11:59:16,666 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-28 11:59:16,666 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-28 11:59:16,666 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 11:59:16,666 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 11:59:16,667 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 11:59:16,667 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 11:59:16,667 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 11:59:16,667 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 11:59:16,667 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-28 11:59:16,667 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-28 11:59:16,667 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-28 11:59:16,668 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 11:59:16,668 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 11:59:16,668 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-28 11:59:16,668 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 11:59:16,668 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-28 11:59:16,668 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 11:59:16,669 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 11:59:16,669 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-28 11:59:16,669 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 11:59:16,669 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 11:59:16,669 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-28 11:59:16,670 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-28 11:59:16,670 INFO L133 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60adf12976c621166b8ffd5e872004e7d6c30802 [2018-11-28 11:59:16,695 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 11:59:16,704 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 11:59:16,706 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 11:59:16,707 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 11:59:16,708 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 11:59:16,708 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/../../sv-benchmarks/c/loops/invert_string_true-unreach-call_true-termination.i [2018-11-28 11:59:16,754 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/data/a34262e46/6de95306e70a48fba65766717a538905/FLAGc40430b3f [2018-11-28 11:59:17,071 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 11:59:17,071 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/sv-benchmarks/c/loops/invert_string_true-unreach-call_true-termination.i [2018-11-28 11:59:17,075 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/data/a34262e46/6de95306e70a48fba65766717a538905/FLAGc40430b3f [2018-11-28 11:59:17,086 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/data/a34262e46/6de95306e70a48fba65766717a538905 [2018-11-28 11:59:17,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 11:59:17,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 11:59:17,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 11:59:17,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 11:59:17,094 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 11:59:17,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4c1343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17, skipping insertion in model container [2018-11-28 11:59:17,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 11:59:17,117 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 11:59:17,223 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:59:17,226 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 11:59:17,240 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:59:17,252 INFO L195 MainTranslator]: Completed translation [2018-11-28 11:59:17,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17 WrapperNode [2018-11-28 11:59:17,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 11:59:17,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 11:59:17,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 11:59:17,253 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 11:59:17,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 11:59:17,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 11:59:17,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 11:59:17,286 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 11:59:17,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... [2018-11-28 11:59:17,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 11:59:17,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 11:59:17,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 11:59:17,329 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 11:59:17,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:59:17,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 11:59:17,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 11:59:17,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 11:59:17,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 11:59:17,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 11:59:17,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 11:59:17,493 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 11:59:17,493 INFO L280 CfgBuilder]: Removed 9 assue(true) statements. [2018-11-28 11:59:17,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:59:17 BoogieIcfgContainer [2018-11-28 11:59:17,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 11:59:17,494 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-28 11:59:17,494 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-28 11:59:17,497 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-28 11:59:17,497 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 11:59:17,497 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 11:59:17" (1/3) ... [2018-11-28 11:59:17,498 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4619cce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:59:17, skipping insertion in model container [2018-11-28 11:59:17,498 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 11:59:17,498 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:59:17" (2/3) ... [2018-11-28 11:59:17,498 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4619cce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:59:17, skipping insertion in model container [2018-11-28 11:59:17,499 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 11:59:17,499 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:59:17" (3/3) ... [2018-11-28 11:59:17,500 INFO L375 chiAutomizerObserver]: Analyzing ICFG invert_string_true-unreach-call_true-termination.i [2018-11-28 11:59:17,534 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 11:59:17,534 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-28 11:59:17,534 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-28 11:59:17,534 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-28 11:59:17,534 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 11:59:17,534 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 11:59:17,535 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-28 11:59:17,535 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 11:59:17,535 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-28 11:59:17,544 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-28 11:59:17,557 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2018-11-28 11:59:17,557 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:17,558 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:17,562 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 11:59:17,562 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-28 11:59:17,562 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-28 11:59:17,562 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-28 11:59:17,563 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2018-11-28 11:59:17,564 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:17,564 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:17,564 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 11:59:17,564 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-28 11:59:17,569 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 8#L-1true havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 16#L16-3true [2018-11-28 11:59:17,569 INFO L796 eck$LassoCheckResult]: Loop: 16#L16-3true assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 18#L16-2true main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 16#L16-3true [2018-11-28 11:59:17,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:17,573 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2018-11-28 11:59:17,574 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:17,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:17,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:17,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:17,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:17,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1283, now seen corresponding path program 1 times [2018-11-28 11:59:17,658 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:17,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:17,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:17,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:17,674 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2018-11-28 11:59:17,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:17,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:17,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:17,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:17,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:17,959 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2018-11-28 11:59:17,970 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:59:17,971 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:59:17,972 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:59:17,972 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:59:17,972 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:59:17,972 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:59:17,972 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:59:17,972 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:59:17,972 INFO L131 ssoRankerPreferences]: Filename of dumped script: invert_string_true-unreach-call_true-termination.i_Iteration1_Lasso [2018-11-28 11:59:17,972 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:59:17,973 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:59:17,992 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:17,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:17,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,044 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,057 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:18,250 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:59:18,254 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:59:18,256 INFO L122 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 [2018-11-28 11:59:18,257 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:18,257 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:59:18,258 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:18,258 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:18,258 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:18,260 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:59:18,260 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:59:18,261 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:18,262 INFO L122 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 [2018-11-28 11:59:18,262 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:18,262 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:18,262 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:18,263 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:18,264 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-28 11:59:18,265 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-28 11:59:18,270 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:18,271 INFO L122 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 [2018-11-28 11:59:18,271 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:18,271 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:59:18,271 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:18,272 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:18,272 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:18,272 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:59:18,272 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:59:18,273 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:18,274 INFO L122 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 [2018-11-28 11:59:18,274 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:18,274 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:18,274 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:18,274 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:18,276 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-28 11:59:18,276 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-28 11:59:18,286 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:18,286 INFO L122 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 [2018-11-28 11:59:18,287 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:18,287 INFO L205 nArgumentSynthesizer]: 2 stem disjuncts [2018-11-28 11:59:18,287 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:18,287 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:18,289 INFO L402 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2018-11-28 11:59:18,289 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-28 11:59:18,294 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:18,295 INFO L122 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 [2018-11-28 11:59:18,295 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:18,295 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:18,295 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:18,296 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:18,297 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-28 11:59:18,297 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-28 11:59:18,301 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:18,301 INFO L122 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 [2018-11-28 11:59:18,302 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:18,302 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:59:18,302 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:18,302 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:18,302 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:18,303 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:59:18,303 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:59:18,304 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:18,304 INFO L122 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 [2018-11-28 11:59:18,304 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:18,305 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:18,305 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:18,305 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:18,309 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-28 11:59:18,309 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-28 11:59:18,343 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:59:18,368 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2018-11-28 11:59:18,368 INFO L444 ModelExtractionUtils]: 13 out of 19 variables were initially zero. Simplification set additionally 2 variables to zero. [2018-11-28 11:59:18,370 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:59:18,372 INFO L440 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2018-11-28 11:59:18,372 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:59:18,373 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_1, ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~#str1~0.offset) = 1*v_rep(select #length ULTIMATE.start_main_~#str1~0.base)_1 - 1*ULTIMATE.start_main_~i~0 - 1*ULTIMATE.start_main_~#str1~0.offset Supporting invariants [] [2018-11-28 11:59:18,385 INFO L297 tatePredicateManager]: 3 out of 3 supporting invariants were superfluous and have been removed [2018-11-28 11:59:18,391 WARN L1298 BoogieBacktranslator]: unknown boogie variable #length [2018-11-28 11:59:18,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:18,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:18,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:18,479 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 [2018-11-28 11:59:18,481 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 3 states. [2018-11-28 11:59:18,518 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 3 states. Result 33 states and 47 transitions. Complement of second has 8 states. [2018-11-28 11:59:18,519 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 [2018-11-28 11:59:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-28 11:59:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 23 transitions. [2018-11-28 11:59:18,522 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 2 letters. Loop has 2 letters. [2018-11-28 11:59:18,523 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:59:18,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 4 letters. Loop has 2 letters. [2018-11-28 11:59:18,523 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:59:18,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 23 transitions. Stem has 2 letters. Loop has 4 letters. [2018-11-28 11:59:18,523 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:59:18,524 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 47 transitions. [2018-11-28 11:59:18,526 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-11-28 11:59:18,530 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 14 states and 19 transitions. [2018-11-28 11:59:18,531 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:18,531 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-11-28 11:59:18,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 19 transitions. [2018-11-28 11:59:18,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 11:59:18,532 INFO L705 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-11-28 11:59:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 19 transitions. [2018-11-28 11:59:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-28 11:59:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-28 11:59:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-11-28 11:59:18,556 INFO L728 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-11-28 11:59:18,556 INFO L608 BuchiCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-11-28 11:59:18,556 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-28 11:59:18,556 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 19 transitions. [2018-11-28 11:59:18,556 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-11-28 11:59:18,557 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:18,557 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:18,557 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-28 11:59:18,557 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-28 11:59:18,557 INFO L794 eck$LassoCheckResult]: Stem: 112#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 108#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 109#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 113#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 110#L24-3 [2018-11-28 11:59:18,558 INFO L796 eck$LassoCheckResult]: Loop: 110#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 111#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 110#L24-3 [2018-11-28 11:59:18,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash 925707, now seen corresponding path program 1 times [2018-11-28 11:59:18,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:18,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:18,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:18,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:18,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:18,665 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:59:18,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 11:59:18,667 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:18,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 1 times [2018-11-28 11:59:18,667 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:18,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:18,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:18,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:18,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:18,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 11:59:18,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 11:59:18,737 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. cyclomatic complexity: 8 Second operand 3 states. [2018-11-28 11:59:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:18,754 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-11-28 11:59:18,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 11:59:18,755 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2018-11-28 11:59:18,755 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:18,756 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 14 states and 16 transitions. [2018-11-28 11:59:18,756 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:18,756 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-28 11:59:18,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 16 transitions. [2018-11-28 11:59:18,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 11:59:18,757 INFO L705 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-11-28 11:59:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 16 transitions. [2018-11-28 11:59:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-11-28 11:59:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-28 11:59:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-11-28 11:59:18,758 INFO L728 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-11-28 11:59:18,758 INFO L608 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-11-28 11:59:18,758 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-28 11:59:18,758 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 15 transitions. [2018-11-28 11:59:18,758 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:18,758 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:18,759 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:18,759 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2018-11-28 11:59:18,759 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-28 11:59:18,759 INFO L794 eck$LassoCheckResult]: Stem: 142#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 137#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 138#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 148#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 149#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 146#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 139#L24-3 [2018-11-28 11:59:18,759 INFO L796 eck$LassoCheckResult]: Loop: 139#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 141#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 139#L24-3 [2018-11-28 11:59:18,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:18,759 INFO L82 PathProgramCache]: Analyzing trace with hash 889660429, now seen corresponding path program 1 times [2018-11-28 11:59:18,759 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:18,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:18,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:18,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:18,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:18,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:59:18,956 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:59:18,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:18,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:19,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2018-11-28 11:59:19,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2018-11-28 11:59:19,041 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-28 11:59:19,045 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:59:19,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-28 11:59:19,055 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-28 11:59:19,062 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-28 11:59:19,063 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:78, output treesize:28 [2018-11-28 11:59:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:19,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:59:19,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-11-28 11:59:19,118 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:19,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 2 times [2018-11-28 11:59:19,118 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:19,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:19,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:19,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:19,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:19,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 11:59:19,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 11:59:19,159 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. cyclomatic complexity: 5 Second operand 8 states. [2018-11-28 11:59:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:19,220 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2018-11-28 11:59:19,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 11:59:19,220 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 18 transitions. [2018-11-28 11:59:19,221 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:19,221 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 18 transitions. [2018-11-28 11:59:19,221 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:19,221 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-28 11:59:19,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 18 transitions. [2018-11-28 11:59:19,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 11:59:19,222 INFO L705 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-11-28 11:59:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 18 transitions. [2018-11-28 11:59:19,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-11-28 11:59:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-28 11:59:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-11-28 11:59:19,223 INFO L728 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-11-28 11:59:19,223 INFO L608 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-11-28 11:59:19,223 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-28 11:59:19,223 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2018-11-28 11:59:19,223 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:19,223 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:19,224 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:19,224 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2018-11-28 11:59:19,224 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-28 11:59:19,224 INFO L794 eck$LassoCheckResult]: Stem: 197#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 192#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 193#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 203#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 204#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 205#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 206#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 200#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 194#L24-3 [2018-11-28 11:59:19,224 INFO L796 eck$LassoCheckResult]: Loop: 194#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 196#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 194#L24-3 [2018-11-28 11:59:19,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:19,224 INFO L82 PathProgramCache]: Analyzing trace with hash 265236367, now seen corresponding path program 2 times [2018-11-28 11:59:19,224 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:19,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:19,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:19,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:59:19,509 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:59:19,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:59:19,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:59:19,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:59:19,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:19,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:59:19,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2018-11-28 11:59:19,604 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:19,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 3 times [2018-11-28 11:59:19,605 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:19,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:19,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:19,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:19,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:19,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 11:59:19,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-28 11:59:19,643 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. cyclomatic complexity: 5 Second operand 10 states. [2018-11-28 11:59:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:19,725 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-11-28 11:59:19,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 11:59:19,725 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2018-11-28 11:59:19,725 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:19,726 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 18 states and 20 transitions. [2018-11-28 11:59:19,726 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:19,726 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-28 11:59:19,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 20 transitions. [2018-11-28 11:59:19,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 11:59:19,726 INFO L705 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-11-28 11:59:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 20 transitions. [2018-11-28 11:59:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-11-28 11:59:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-28 11:59:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-11-28 11:59:19,727 INFO L728 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-11-28 11:59:19,727 INFO L608 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-11-28 11:59:19,727 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-28 11:59:19,727 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 19 transitions. [2018-11-28 11:59:19,727 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:19,727 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:19,727 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:19,728 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1] [2018-11-28 11:59:19,728 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-28 11:59:19,728 INFO L794 eck$LassoCheckResult]: Stem: 266#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 261#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 262#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 272#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 277#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 275#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 273#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 274#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 276#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 270#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 263#L24-3 [2018-11-28 11:59:19,728 INFO L796 eck$LassoCheckResult]: Loop: 263#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 265#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 263#L24-3 [2018-11-28 11:59:19,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:19,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1489134225, now seen corresponding path program 3 times [2018-11-28 11:59:19,728 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:19,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:19,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:19,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:19,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:20,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:59:20,000 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:59:20,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:59:20,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 11:59:20,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:59:20,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:20,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2018-11-28 11:59:20,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2018-11-28 11:59:20,052 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-28 11:59:20,055 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:59:20,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-28 11:59:20,073 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-28 11:59:20,079 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-28 11:59:20,080 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:78, output treesize:28 [2018-11-28 11:59:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:20,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:59:20,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2018-11-28 11:59:20,159 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:20,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 4 times [2018-11-28 11:59:20,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:20,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:20,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:20,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 11:59:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-11-28 11:59:20,206 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. cyclomatic complexity: 5 Second operand 12 states. [2018-11-28 11:59:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:20,309 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-11-28 11:59:20,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 11:59:20,310 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 22 transitions. [2018-11-28 11:59:20,310 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:20,310 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 20 states and 22 transitions. [2018-11-28 11:59:20,310 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:20,310 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-28 11:59:20,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 22 transitions. [2018-11-28 11:59:20,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 11:59:20,311 INFO L705 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-11-28 11:59:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 22 transitions. [2018-11-28 11:59:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-11-28 11:59:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-28 11:59:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-11-28 11:59:20,312 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-11-28 11:59:20,312 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-11-28 11:59:20,312 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-28 11:59:20,312 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 21 transitions. [2018-11-28 11:59:20,312 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:20,312 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:20,312 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:20,312 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 1, 1, 1, 1] [2018-11-28 11:59:20,312 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-28 11:59:20,313 INFO L794 eck$LassoCheckResult]: Stem: 345#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 340#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 341#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 351#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 352#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 353#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 354#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 358#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 357#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 356#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 355#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 348#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 342#L24-3 [2018-11-28 11:59:20,313 INFO L796 eck$LassoCheckResult]: Loop: 342#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 344#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 342#L24-3 [2018-11-28 11:59:20,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash 833936659, now seen corresponding path program 4 times [2018-11-28 11:59:20,313 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:20,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:20,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:20,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:20,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:59:20,400 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:59:20,409 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:59:20,422 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:59:20,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:59:20,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:20,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2018-11-28 11:59:20,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2018-11-28 11:59:20,455 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-28 11:59:20,461 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:59:20,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-28 11:59:20,475 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-28 11:59:20,485 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-28 11:59:20,485 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:78, output treesize:28 [2018-11-28 11:59:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:20,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:59:20,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-11-28 11:59:20,588 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:20,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 5 times [2018-11-28 11:59:20,589 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:20,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:20,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:20,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:20,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 11:59:20,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-11-28 11:59:20,625 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. cyclomatic complexity: 5 Second operand 13 states. [2018-11-28 11:59:20,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:20,740 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-11-28 11:59:20,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 11:59:20,741 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 24 transitions. [2018-11-28 11:59:20,741 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:20,741 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 22 states and 24 transitions. [2018-11-28 11:59:20,742 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:20,742 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-28 11:59:20,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 24 transitions. [2018-11-28 11:59:20,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 11:59:20,742 INFO L705 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-11-28 11:59:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 24 transitions. [2018-11-28 11:59:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-11-28 11:59:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 11:59:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-11-28 11:59:20,744 INFO L728 BuchiCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-11-28 11:59:20,744 INFO L608 BuchiCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-11-28 11:59:20,744 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-28 11:59:20,744 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 23 transitions. [2018-11-28 11:59:20,744 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2018-11-28 11:59:20,744 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:20,744 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:20,745 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1, 1] [2018-11-28 11:59:20,745 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-28 11:59:20,745 INFO L794 eck$LassoCheckResult]: Stem: 435#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 430#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 431#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 441#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 442#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 443#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 444#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 450#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 449#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 448#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 447#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 446#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 445#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 438#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 432#L24-3 [2018-11-28 11:59:20,745 INFO L796 eck$LassoCheckResult]: Loop: 432#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 434#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 432#L24-3 [2018-11-28 11:59:20,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:20,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1745699051, now seen corresponding path program 5 times [2018-11-28 11:59:20,745 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:20,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:20,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:20,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:20,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:20,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1731, now seen corresponding path program 6 times [2018-11-28 11:59:20,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:20,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:20,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:20,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:20,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:20,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425495, now seen corresponding path program 1 times [2018-11-28 11:59:20,776 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:20,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:20,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:20,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:21,721 WARN L180 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2018-11-28 11:59:21,893 WARN L180 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2018-11-28 11:59:21,894 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:59:21,894 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:59:21,894 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:59:21,894 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:59:21,894 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:59:21,895 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:59:21,895 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:59:21,895 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:59:21,895 INFO L131 ssoRankerPreferences]: Filename of dumped script: invert_string_true-unreach-call_true-termination.i_Iteration7_Lasso [2018-11-28 11:59:21,895 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:59:21,895 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:59:21,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,899 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,960 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:21,965 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:22,180 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:59:22,180 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:59:22,180 INFO L122 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 [2018-11-28 11:59:22,180 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:22,181 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:59:22,181 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:22,181 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:22,181 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:22,181 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:59:22,181 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:59:22,182 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:22,182 INFO L122 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 [2018-11-28 11:59:22,182 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:22,182 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:59:22,183 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:22,183 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:22,183 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:22,183 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:59:22,183 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:59:22,183 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:22,184 INFO L122 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 [2018-11-28 11:59:22,184 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:22,184 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:22,184 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:22,184 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:22,185 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-28 11:59:22,185 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-28 11:59:22,187 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:59:22,187 INFO L122 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 [2018-11-28 11:59:22,188 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:59:22,188 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:59:22,188 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:59:22,188 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:59:22,190 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-28 11:59:22,190 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-28 11:59:22,199 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:59:22,213 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2018-11-28 11:59:22,213 INFO L444 ModelExtractionUtils]: 18 out of 25 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 11:59:22,214 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:59:22,214 INFO L440 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2018-11-28 11:59:22,214 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:59:22,214 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~#str2~0.offset, ULTIMATE.start_main_~j~0) = -2*ULTIMATE.start_main_~#str2~0.offset - 2*ULTIMATE.start_main_~j~0 + 8589934589 Supporting invariants [-1*v_rep(select #length ULTIMATE.start_main_~#str2~0.base)_2 + 4294967295 >= 0] [2018-11-28 11:59:22,232 INFO L297 tatePredicateManager]: 3 out of 4 supporting invariants were superfluous and have been removed [2018-11-28 11:59:22,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:22,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:22,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2018-11-28 11:59:22,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2018-11-28 11:59:22,265 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-28 11:59:22,271 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:59:22,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2018-11-28 11:59:22,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-11-28 11:59:22,286 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-28 11:59:22,291 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:59:22,303 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2018-11-28 11:59:22,304 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:46, output treesize:48 [2018-11-28 11:59:24,290 WARN L180 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 29 [2018-11-28 11:59:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:24,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:59:24,332 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 2 loop predicates [2018-11-28 11:59:24,332 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 23 transitions. cyclomatic complexity: 5 Second operand 4 states. [2018-11-28 11:59:26,524 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 23 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 25 states and 29 transitions. Complement of second has 6 states. [2018-11-28 11:59:26,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-28 11:59:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-28 11:59:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2018-11-28 11:59:26,524 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 14 letters. Loop has 2 letters. [2018-11-28 11:59:26,525 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:59:26,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 16 letters. Loop has 2 letters. [2018-11-28 11:59:26,526 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:59:26,526 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 14 letters. Loop has 4 letters. [2018-11-28 11:59:26,526 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:59:26,526 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 29 transitions. [2018-11-28 11:59:26,527 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:26,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 27 transitions. [2018-11-28 11:59:26,527 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2018-11-28 11:59:26,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-11-28 11:59:26,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 27 transitions. [2018-11-28 11:59:26,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:59:26,528 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-11-28 11:59:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 27 transitions. [2018-11-28 11:59:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-11-28 11:59:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 11:59:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-11-28 11:59:26,529 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-11-28 11:59:26,529 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-11-28 11:59:26,529 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-28 11:59:26,529 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 26 transitions. [2018-11-28 11:59:26,530 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:26,530 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:26,530 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:26,530 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1, 1, 1, 1] [2018-11-28 11:59:26,530 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:59:26,530 INFO L794 eck$LassoCheckResult]: Stem: 575#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 569#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 570#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 582#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 583#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 584#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 585#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 591#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 590#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 589#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 588#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 587#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 586#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 578#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 579#L24-3 assume !(main_~i~0 >= 0); 572#L24-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 576#L30-3 [2018-11-28 11:59:26,531 INFO L796 eck$LassoCheckResult]: Loop: 576#L30-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem6 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem7 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem6 == main_#t~mem7 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 577#L4 assume !(0 == __VERIFIER_assert_~cond); 581#L4-2 havoc main_#t~mem7;havoc main_#t~mem6;main_#t~post8 := main_~j~0;main_~j~0 := main_#t~post8 - 1;havoc main_#t~post8; 580#L30-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 576#L30-3 [2018-11-28 11:59:26,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:26,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425437, now seen corresponding path program 1 times [2018-11-28 11:59:26,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:26,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:26,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:26,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 11:59:26,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:59:26,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 11:59:26,570 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:26,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:26,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 1 times [2018-11-28 11:59:26,571 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:26,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:26,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:26,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:26,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 11:59:26,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 11:59:26,652 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. cyclomatic complexity: 6 Second operand 4 states. [2018-11-28 11:59:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:26,669 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-11-28 11:59:26,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 11:59:26,669 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 25 transitions. [2018-11-28 11:59:26,670 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:26,670 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 23 states and 25 transitions. [2018-11-28 11:59:26,670 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:26,670 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-28 11:59:26,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 25 transitions. [2018-11-28 11:59:26,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:59:26,671 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-28 11:59:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 25 transitions. [2018-11-28 11:59:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 11:59:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 11:59:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-28 11:59:26,672 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-28 11:59:26,672 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-28 11:59:26,672 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-28 11:59:26,672 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 25 transitions. [2018-11-28 11:59:26,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:26,673 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:26,673 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:26,673 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:59:26,673 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:59:26,673 INFO L794 eck$LassoCheckResult]: Stem: 629#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 624#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 625#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 636#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 637#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 638#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 639#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 646#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 645#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 644#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 643#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 642#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 641#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 633#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 626#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 627#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 632#L24-3 assume !(main_~i~0 >= 0); 640#L24-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 630#L30-3 [2018-11-28 11:59:26,674 INFO L796 eck$LassoCheckResult]: Loop: 630#L30-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem6 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem7 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem6 == main_#t~mem7 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 631#L4 assume !(0 == __VERIFIER_assert_~cond); 635#L4-2 havoc main_#t~mem7;havoc main_#t~mem6;main_#t~post8 := main_~j~0;main_~j~0 := main_#t~post8 - 1;havoc main_#t~post8; 634#L30-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 630#L30-3 [2018-11-28 11:59:26,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:26,674 INFO L82 PathProgramCache]: Analyzing trace with hash -743540257, now seen corresponding path program 1 times [2018-11-28 11:59:26,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:26,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:26,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:26,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 11:59:26,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:59:26,735 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:59:26,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:26,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 11:59:26,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:59:26,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-11-28 11:59:26,808 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:26,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 2 times [2018-11-28 11:59:26,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:26,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:26,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:59:26,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:26,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 11:59:26,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 11:59:26,891 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. cyclomatic complexity: 5 Second operand 8 states. [2018-11-28 11:59:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:26,945 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-11-28 11:59:26,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 11:59:26,945 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 30 transitions. [2018-11-28 11:59:26,946 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:26,946 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 26 states and 29 transitions. [2018-11-28 11:59:26,946 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:26,946 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-28 11:59:26,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 29 transitions. [2018-11-28 11:59:26,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:59:26,947 INFO L705 BuchiCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-11-28 11:59:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 29 transitions. [2018-11-28 11:59:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2018-11-28 11:59:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 11:59:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-11-28 11:59:26,948 INFO L728 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-28 11:59:26,948 INFO L608 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-28 11:59:26,948 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-11-28 11:59:26,948 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 26 transitions. [2018-11-28 11:59:26,948 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:26,948 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:26,949 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:26,949 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 11:59:26,949 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:59:26,949 INFO L794 eck$LassoCheckResult]: Stem: 746#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 740#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 741#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 752#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 753#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 754#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 755#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 763#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 762#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 761#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 760#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 758#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 757#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 749#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 742#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 743#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 744#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 745#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 759#L24-3 assume !(main_~i~0 >= 0); 756#L24-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 747#L30-3 [2018-11-28 11:59:26,949 INFO L796 eck$LassoCheckResult]: Loop: 747#L30-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem6 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem7 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem6 == main_#t~mem7 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 748#L4 assume !(0 == __VERIFIER_assert_~cond); 751#L4-2 havoc main_#t~mem7;havoc main_#t~mem6;main_#t~post8 := main_~j~0;main_~j~0 := main_#t~post8 - 1;havoc main_#t~post8; 750#L30-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 747#L30-3 [2018-11-28 11:59:26,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:26,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1577559391, now seen corresponding path program 2 times [2018-11-28 11:59:26,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:26,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:26,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:26,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 11:59:27,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:59:27,023 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:59:27,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:59:27,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:59:27,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:59:27,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 11:59:27,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:59:27,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-11-28 11:59:27,118 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:27,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:27,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 3 times [2018-11-28 11:59:27,118 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:27,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:27,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:27,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:27,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:27,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 11:59:27,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-28 11:59:27,195 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. cyclomatic complexity: 5 Second operand 11 states. [2018-11-28 11:59:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:27,259 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-11-28 11:59:27,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 11:59:27,259 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 32 transitions. [2018-11-28 11:59:27,259 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:27,260 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 28 states and 31 transitions. [2018-11-28 11:59:27,260 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:27,260 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-28 11:59:27,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 31 transitions. [2018-11-28 11:59:27,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:59:27,260 INFO L705 BuchiCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-11-28 11:59:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 31 transitions. [2018-11-28 11:59:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-11-28 11:59:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-28 11:59:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-11-28 11:59:27,261 INFO L728 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-28 11:59:27,262 INFO L608 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-28 11:59:27,262 INFO L442 BuchiCegarLoop]: ======== Iteration 11============ [2018-11-28 11:59:27,262 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2018-11-28 11:59:27,262 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:27,262 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:27,262 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:27,263 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-28 11:59:27,263 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:59:27,263 INFO L794 eck$LassoCheckResult]: Stem: 878#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 872#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 873#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 885#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 886#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 887#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 897#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 896#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 895#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 894#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 893#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 890#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 889#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 882#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 874#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 875#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 876#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 877#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 881#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 892#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 891#L24-3 assume !(main_~i~0 >= 0); 888#L24-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 879#L30-3 [2018-11-28 11:59:27,263 INFO L796 eck$LassoCheckResult]: Loop: 879#L30-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem6 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem7 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem6 == main_#t~mem7 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 880#L4 assume !(0 == __VERIFIER_assert_~cond); 884#L4-2 havoc main_#t~mem7;havoc main_#t~mem6;main_#t~post8 := main_~j~0;main_~j~0 := main_#t~post8 - 1;havoc main_#t~post8; 883#L30-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 879#L30-3 [2018-11-28 11:59:27,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash 88937187, now seen corresponding path program 3 times [2018-11-28 11:59:27,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:27,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:27,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:27,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:27,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 11:59:27,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:59:27,345 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:59:27,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:59:27,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 11:59:27,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:59:27,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 11:59:27,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:59:27,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-11-28 11:59:27,436 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:27,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 4 times [2018-11-28 11:59:27,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:27,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:27,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:27,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:27,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:27,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 11:59:27,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-11-28 11:59:27,556 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. cyclomatic complexity: 5 Second operand 13 states. [2018-11-28 11:59:27,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:27,720 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-28 11:59:27,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 11:59:27,720 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 34 transitions. [2018-11-28 11:59:27,721 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:27,721 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 30 states and 33 transitions. [2018-11-28 11:59:27,721 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-28 11:59:27,721 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-28 11:59:27,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 33 transitions. [2018-11-28 11:59:27,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:59:27,721 INFO L705 BuchiCegarLoop]: Abstraction has 30 states and 33 transitions. [2018-11-28 11:59:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 33 transitions. [2018-11-28 11:59:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2018-11-28 11:59:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 11:59:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-11-28 11:59:27,722 INFO L728 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-11-28 11:59:27,722 INFO L608 BuchiCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-11-28 11:59:27,722 INFO L442 BuchiCegarLoop]: ======== Iteration 12============ [2018-11-28 11:59:27,722 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 30 transitions. [2018-11-28 11:59:27,722 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:27,723 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:27,723 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:27,723 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-28 11:59:27,723 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:59:27,723 INFO L794 eck$LassoCheckResult]: Stem: 1024#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 1018#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 1019#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1032#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1033#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1034#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1044#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1043#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1042#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1041#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1040#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1037#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1036#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 1029#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 1020#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 1021#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 1022#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 1023#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 1045#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 1027#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 1028#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 1039#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 1038#L24-3 assume !(main_~i~0 >= 0); 1035#L24-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 1025#L30-3 [2018-11-28 11:59:27,723 INFO L796 eck$LassoCheckResult]: Loop: 1025#L30-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem6 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem7 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem6 == main_#t~mem7 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1026#L4 assume !(0 == __VERIFIER_assert_~cond); 1031#L4-2 havoc main_#t~mem7;havoc main_#t~mem6;main_#t~post8 := main_~j~0;main_~j~0 := main_#t~post8 - 1;havoc main_#t~post8; 1030#L30-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 1025#L30-3 [2018-11-28 11:59:27,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:27,723 INFO L82 PathProgramCache]: Analyzing trace with hash -430652763, now seen corresponding path program 4 times [2018-11-28 11:59:27,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:27,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:27,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:27,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:27,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:59:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 11:59:27,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:59:27,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e90d3f1b-3494-4ac6-8620-2141dbd18d23/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:59:27,932 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:59:27,954 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:59:27,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:59:27,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:59:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 11:59:28,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:59:28,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-28 11:59:28,056 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:59:28,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 5 times [2018-11-28 11:59:28,056 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:28,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:28,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:28,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:28,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:28,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 11:59:28,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2018-11-28 11:59:28,138 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. cyclomatic complexity: 5 Second operand 16 states. [2018-11-28 11:59:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:59:28,472 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-11-28 11:59:28,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 11:59:28,472 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 50 transitions. [2018-11-28 11:59:28,473 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:28,473 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 47 states and 49 transitions. [2018-11-28 11:59:28,473 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 27 [2018-11-28 11:59:28,474 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2018-11-28 11:59:28,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 49 transitions. [2018-11-28 11:59:28,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:59:28,474 INFO L705 BuchiCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-11-28 11:59:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 49 transitions. [2018-11-28 11:59:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-11-28 11:59:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 11:59:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-11-28 11:59:28,475 INFO L728 BuchiCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-11-28 11:59:28,475 INFO L608 BuchiCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-11-28 11:59:28,475 INFO L442 BuchiCegarLoop]: ======== Iteration 13============ [2018-11-28 11:59:28,475 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 30 states and 32 transitions. [2018-11-28 11:59:28,476 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 11:59:28,476 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:59:28,476 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:59:28,476 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-28 11:59:28,476 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:59:28,476 INFO L794 eck$LassoCheckResult]: Stem: 1210#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; 1204#L-1 havoc main_#res;havoc main_#t~nondet1, main_#t~post0, main_#t~mem3, main_#t~post4, main_#t~post2, main_#t~mem6, main_#t~mem7, main_#t~post8, main_#t~post5, main_~max~0, main_~#str1~0.base, main_~#str1~0.offset, main_~#str2~0.base, main_~#str2~0.offset, main_~i~0, main_~j~0;main_~max~0 := 5;call main_~#str1~0.base, main_~#str1~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));call main_~#str2~0.base, main_~#str2~0.offset := #Ultimate.alloc((if main_~max~0 % 4294967296 % 4294967296 <= 2147483647 then main_~max~0 % 4294967296 % 4294967296 else main_~max~0 % 4294967296 % 4294967296 - 4294967296));havoc main_~i~0;havoc main_~j~0;main_~i~0 := 0; 1205#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1216#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1217#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1218#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1229#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1228#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1227#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1226#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1225#L16-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call write~int(main_#t~nondet1, main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);havoc main_#t~nondet1; 1221#L16-2 main_#t~post0 := main_~i~0;main_~i~0 := 1 + main_#t~post0;havoc main_#t~post0; 1220#L16-3 assume !(main_~i~0 % 4294967296 < main_~max~0 % 4294967296); 1213#L16-4 call write~int(0, main_~#str1~0.base, main_~#str1~0.offset + (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296), 1);main_~j~0 := 0;main_~i~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296); 1206#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 1207#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 1208#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 1209#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 1233#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 1232#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 1231#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 1230#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 1224#L24-3 assume !!(main_~i~0 >= 0);call main_#t~mem3 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call write~int(main_#t~mem3, main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);havoc main_#t~mem3;main_#t~post4 := main_~j~0;main_~j~0 := 1 + main_#t~post4;havoc main_#t~post4; 1223#L24-2 main_#t~post2 := main_~i~0;main_~i~0 := main_#t~post2 - 1;havoc main_#t~post2; 1222#L24-3 assume !(main_~i~0 >= 0); 1219#L24-4 main_~j~0 := (if (main_~max~0 - 1) % 4294967296 % 4294967296 <= 2147483647 then (main_~max~0 - 1) % 4294967296 % 4294967296 else (main_~max~0 - 1) % 4294967296 % 4294967296 - 4294967296);main_~i~0 := 0; 1211#L30-3 [2018-11-28 11:59:28,477 INFO L796 eck$LassoCheckResult]: Loop: 1211#L30-3 assume !!(main_~i~0 % 4294967296 < main_~max~0 % 4294967296);call main_#t~mem6 := read~int(main_~#str1~0.base, main_~#str1~0.offset + main_~i~0, 1);call main_#t~mem7 := read~int(main_~#str2~0.base, main_~#str2~0.offset + main_~j~0, 1);__VERIFIER_assert_#in~cond := (if main_#t~mem6 == main_#t~mem7 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1212#L4 assume !(0 == __VERIFIER_assert_~cond); 1215#L4-2 havoc main_#t~mem7;havoc main_#t~mem6;main_#t~post8 := main_~j~0;main_~j~0 := main_#t~post8 - 1;havoc main_#t~post8; 1214#L30-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 1211#L30-3 [2018-11-28 11:59:28,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1540388377, now seen corresponding path program 5 times [2018-11-28 11:59:28,477 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:28,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:28,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:28,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:28,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:28,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2100362, now seen corresponding path program 6 times [2018-11-28 11:59:28,518 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:28,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:28,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:28,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:28,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:28,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:59:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1945357456, now seen corresponding path program 1 times [2018-11-28 11:59:28,524 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:59:28,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:59:28,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:28,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:59:28,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:59:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:59:39,052 WARN L180 SmtUtils]: Spent 10.37 s on a formula simplification. DAG size of input: 266 DAG size of output: 205 [2018-11-28 11:59:40,642 WARN L180 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 167 DAG size of output: 122 [2018-11-28 11:59:40,644 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:59:40,644 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:59:40,645 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:59:40,645 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:59:40,645 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:59:40,645 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:59:40,645 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:59:40,645 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:59:40,645 INFO L131 ssoRankerPreferences]: Filename of dumped script: invert_string_true-unreach-call_true-termination.i_Iteration13_Lasso [2018-11-28 11:59:40,645 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:59:40,645 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:59:40,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:59:40,875 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer has thrown an exception: java.lang.AssertionError: MapEliminator tries to combine Int and (Array Int Int) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.mapelimination.MapEliminator.indexEqualityInequalityImpliesValueEquality(MapEliminator.java:850) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.mapelimination.MapEliminator.replaceSelectStoreTerm(MapEliminator.java:592) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.mapelimination.MapEliminator.replaceStoreTerms(MapEliminator.java:542) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.mapelimination.MapEliminator.getRewrittenTransFormula(MapEliminator.java:330) at de.uni_freiburg.informatik.ultimate.lassoranker.preprocessors.MapEliminationLassoPreprocessor.process(MapEliminationLassoPreprocessor.java:109) at de.uni_freiburg.informatik.ultimate.lassoranker.variables.LassoBuilder.applyPreprocessor(LassoBuilder.java:154) at de.uni_freiburg.informatik.ultimate.lassoranker.variables.LassoBuilder.preprocess(LassoBuilder.java:262) at de.uni_freiburg.informatik.ultimate.lassoranker.LassoAnalysis.preprocess(LassoAnalysis.java:286) at de.uni_freiburg.informatik.ultimate.lassoranker.LassoAnalysis.(LassoAnalysis.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.synthesize(LassoCheck.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.access$16(LassoCheck.java:539) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.checkLassoTermination(LassoCheck.java:958) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.(LassoCheck.java:865) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.(LassoCheck.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoop.iterate(BuchiCegarLoop.java:476) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.doTerminationAnalysis(BuchiAutomizerObserver.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.finish(BuchiAutomizerObserver.java:384) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-11-28 11:59:40,877 INFO L168 Benchmark]: Toolchain (without parser) took 23787.85 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 243.3 MB). Free memory was 953.3 MB in the beginning and 865.6 MB in the end (delta: 87.7 MB). Peak memory consumption was 331.0 MB. Max. memory is 11.5 GB. [2018-11-28 11:59:40,878 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:59:40,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.11 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-28 11:59:40,878 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.16 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 988.0 MB in the end (delta: -45.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 11.5 GB. [2018-11-28 11:59:40,879 INFO L168 Benchmark]: Boogie Preprocessor took 43.15 ms. Allocated memory is still 1.0 GB. Free memory was 988.0 MB in the beginning and 1.0 GB in the end (delta: -20.2 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. [2018-11-28 11:59:40,879 INFO L168 Benchmark]: RCFGBuilder took 164.56 ms. Allocated memory is still 1.0 GB. Free memory was 1.0 GB in the beginning and 990.5 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:59:40,880 INFO L168 Benchmark]: BuchiAutomizer took 23382.63 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 243.3 MB). Free memory was 990.5 MB in the beginning and 865.6 MB in the end (delta: 124.9 MB). Peak memory consumption was 368.2 MB. Max. memory is 11.5 GB. [2018-11-28 11:59:40,882 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 162.11 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.16 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 988.0 MB in the end (delta: -45.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 43.15 ms. Allocated memory is still 1.0 GB. Free memory was 988.0 MB in the beginning and 1.0 GB in the end (delta: -20.2 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. * RCFGBuilder took 164.56 ms. Allocated memory is still 1.0 GB. Free memory was 1.0 GB in the beginning and 990.5 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 23382.63 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 243.3 MB). Free memory was 990.5 MB in the beginning and 865.6 MB in the end (delta: 124.9 MB). Peak memory consumption was 368.2 MB. 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.buchiautomizer: - ExceptionOrErrorResult: AssertionError: MapEliminator tries to combine Int and (Array Int Int) de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: AssertionError: MapEliminator tries to combine Int and (Array Int Int): de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.mapelimination.MapEliminator.indexEqualityInequalityImpliesValueEquality(MapEliminator.java:850) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...