./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b312eb4f8caa7cb61d3a06c0594e4f86d10948be ................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:15:27,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:15:27,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:15:27,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:15:27,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:15:27,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:15:27,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:15:27,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:15:27,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:15:27,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:15:27,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:15:27,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:15:27,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:15:27,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:15:27,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:15:27,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:15:27,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:15:27,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:15:27,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:15:27,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:15:27,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:15:27,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:15:27,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:15:27,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:15:27,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:15:27,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:15:27,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:15:27,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:15:27,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:15:27,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:15:27,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:15:27,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:15:27,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:15:27,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:15:27,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:15:27,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:15:27,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:15:27,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:15:27,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:15:27,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:15:27,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:15:27,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:15:27,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:15:27,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:15:27,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:15:27,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:15:27,760 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:15:27,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:15:27,760 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:15:27,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:15:27,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:15:27,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:15:27,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:15:27,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:15:27,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:15:27,762 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:15:27,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:15:27,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:15:27,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:15:27,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:15:27,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:15:27,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:15:27,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:15:27,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:15:27,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:15:27,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:15:27,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:15:27,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:15:27,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:15:27,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:15:27,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:15:27,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b312eb4f8caa7cb61d3a06c0594e4f86d10948be [2020-11-29 22:15:28,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:15:28,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:15:28,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:15:28,159 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:15:28,160 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:15:28,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/../../sv-benchmarks/c/loops/string-1.i [2020-11-29 22:15:28,257 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/data/c58c7f5a6/fc10e64d298f4a669e245af75746c605/FLAGab258d09c [2020-11-29 22:15:28,817 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:15:28,819 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/sv-benchmarks/c/loops/string-1.i [2020-11-29 22:15:28,828 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/data/c58c7f5a6/fc10e64d298f4a669e245af75746c605/FLAGab258d09c [2020-11-29 22:15:29,174 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/data/c58c7f5a6/fc10e64d298f4a669e245af75746c605 [2020-11-29 22:15:29,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:15:29,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:15:29,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:15:29,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:15:29,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:15:29,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e5ece9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29, skipping insertion in model container [2020-11-29 22:15:29,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:15:29,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:15:29,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:15:29,483 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:15:29,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:15:29,549 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:15:29,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29 WrapperNode [2020-11-29 22:15:29,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:15:29,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:15:29,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:15:29,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:15:29,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:15:29,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:15:29,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:15:29,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:15:29,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... [2020-11-29 22:15:29,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:15:29,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:15:29,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:15:29,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:15:29,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:15:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:15:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:15:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 22:15:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:15:29,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:15:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 22:15:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 22:15:30,128 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:15:30,129 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 22:15:30,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:15:30 BoogieIcfgContainer [2020-11-29 22:15:30,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:15:30,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:15:30,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:15:30,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:15:30,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:15:29" (1/3) ... [2020-11-29 22:15:30,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434573e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:15:30, skipping insertion in model container [2020-11-29 22:15:30,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:15:29" (2/3) ... [2020-11-29 22:15:30,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434573e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:15:30, skipping insertion in model container [2020-11-29 22:15:30,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:15:30" (3/3) ... [2020-11-29 22:15:30,144 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-11-29 22:15:30,158 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:15:30,165 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 22:15:30,178 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 22:15:30,230 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:15:30,232 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:15:30,233 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:15:30,233 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:15:30,233 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:15:30,233 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:15:30,233 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:15:30,234 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:15:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-29 22:15:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 22:15:30,268 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:15:30,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:15:30,270 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:15:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:15:30,277 INFO L82 PathProgramCache]: Analyzing trace with hash -610986519, now seen corresponding path program 1 times [2020-11-29 22:15:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:15:30,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862213905] [2020-11-29 22:15:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:15:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:15:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:15:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862213905] [2020-11-29 22:15:30,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:15:30,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:15:30,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606281099] [2020-11-29 22:15:30,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 22:15:30,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:15:30,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 22:15:30,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:15:30,570 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-11-29 22:15:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:15:30,594 INFO L93 Difference]: Finished difference Result 53 states and 81 transitions. [2020-11-29 22:15:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 22:15:30,596 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-11-29 22:15:30,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:15:30,607 INFO L225 Difference]: With dead ends: 53 [2020-11-29 22:15:30,608 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 22:15:30,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:15:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 22:15:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 22:15:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 22:15:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-11-29 22:15:30,673 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2020-11-29 22:15:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:15:30,675 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-11-29 22:15:30,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 22:15:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-11-29 22:15:30,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:15:30,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:15:30,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:15:30,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:15:30,679 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:15:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:15:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2052613417, now seen corresponding path program 1 times [2020-11-29 22:15:30,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:15:30,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865963217] [2020-11-29 22:15:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:15:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:15:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:15:30,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865963217] [2020-11-29 22:15:30,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:15:30,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:15:30,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732226879] [2020-11-29 22:15:30,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:15:30,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:15:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:15:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:15:30,782 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 3 states. [2020-11-29 22:15:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:15:30,876 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-11-29 22:15:30,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:15:30,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-29 22:15:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:15:30,880 INFO L225 Difference]: With dead ends: 56 [2020-11-29 22:15:30,880 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 22:15:30,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:15:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 22:15:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2020-11-29 22:15:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 22:15:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-11-29 22:15:30,888 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 20 [2020-11-29 22:15:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:15:30,888 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-11-29 22:15:30,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:15:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-11-29 22:15:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 22:15:30,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:15:30,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:15:30,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:15:30,890 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:15:30,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:15:30,891 INFO L82 PathProgramCache]: Analyzing trace with hash -903714569, now seen corresponding path program 1 times [2020-11-29 22:15:30,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:15:30,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969487274] [2020-11-29 22:15:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:15:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:15:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:15:30,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969487274] [2020-11-29 22:15:30,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012391809] [2020-11-29 22:15:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:15:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:15:31,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 22:15:31,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:15:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:15:31,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:15:31,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 22:15:31,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566611849] [2020-11-29 22:15:31,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:15:31,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:15:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:15:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:15:31,117 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2020-11-29 22:15:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:15:31,241 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-11-29 22:15:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:15:31,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-11-29 22:15:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:15:31,246 INFO L225 Difference]: With dead ends: 69 [2020-11-29 22:15:31,246 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 22:15:31,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:15:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 22:15:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 30. [2020-11-29 22:15:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 22:15:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-29 22:15:31,259 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2020-11-29 22:15:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:15:31,259 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-29 22:15:31,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:15:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-29 22:15:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 22:15:31,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:15:31,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:15:31,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 22:15:31,462 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:15:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:15:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash -326197737, now seen corresponding path program 2 times [2020-11-29 22:15:31,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:15:31,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700234079] [2020-11-29 22:15:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:15:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:15:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 22:15:31,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700234079] [2020-11-29 22:15:31,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482959080] [2020-11-29 22:15:31,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:15:31,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 22:15:31,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:15:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:15:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:15:31,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:15:31,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:15:31,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:15:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 22:15:31,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:15:31,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-11-29 22:15:31,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842320324] [2020-11-29 22:15:31,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:15:31,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:15:31,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:15:31,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:15:31,786 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-11-29 22:15:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:15:31,848 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-11-29 22:15:31,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:15:31,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-11-29 22:15:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:15:31,849 INFO L225 Difference]: With dead ends: 40 [2020-11-29 22:15:31,849 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 22:15:31,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:15:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 22:15:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 22:15:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 22:15:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 22:15:31,851 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-11-29 22:15:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:15:31,851 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:15:31,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:15:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 22:15:31,852 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 22:15:32,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:15:32,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 22:15:32,090 INFO L274 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-11-29 22:15:32,091 INFO L277 CegarLoopResult]: At program point L19-2(lines 18 23) the Hoare annotation is: true [2020-11-29 22:15:32,091 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 22:15:32,091 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 22:15:32,091 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-11-29 22:15:32,091 INFO L274 CegarLoopResult]: For program point L53-2(lines 53 65) no Hoare annotation was computed. [2020-11-29 22:15:32,091 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-29 22:15:32,091 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-29 22:15:32,092 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-29 22:15:32,092 INFO L274 CegarLoopResult]: For program point L37-2(lines 37 38) no Hoare annotation was computed. [2020-11-29 22:15:32,092 INFO L277 CegarLoopResult]: At program point L37-3(lines 37 38) the Hoare annotation is: true [2020-11-29 22:15:32,092 INFO L274 CegarLoopResult]: For program point L37-4(lines 37 38) no Hoare annotation was computed. [2020-11-29 22:15:32,092 INFO L274 CegarLoopResult]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2020-11-29 22:15:32,092 INFO L277 CegarLoopResult]: At program point L46-3(lines 46 47) the Hoare annotation is: true [2020-11-29 22:15:32,092 INFO L274 CegarLoopResult]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2020-11-29 22:15:32,092 INFO L277 CegarLoopResult]: At program point L71(lines 28 72) the Hoare annotation is: true [2020-11-29 22:15:32,092 INFO L274 CegarLoopResult]: For program point L55(lines 55 64) no Hoare annotation was computed. [2020-11-29 22:15:32,092 INFO L277 CegarLoopResult]: At program point L55-2(lines 53 65) the Hoare annotation is: true [2020-11-29 22:15:32,093 INFO L274 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-11-29 22:15:32,093 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 22:15:32,093 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-29 22:15:32,093 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 22:15:32,093 INFO L274 CegarLoopResult]: For program point L33-2(lines 33 34) no Hoare annotation was computed. [2020-11-29 22:15:32,093 INFO L277 CegarLoopResult]: At program point L33-3(lines 33 34) the Hoare annotation is: true [2020-11-29 22:15:32,093 INFO L274 CegarLoopResult]: For program point L33-4(lines 33 34) no Hoare annotation was computed. [2020-11-29 22:15:32,093 INFO L274 CegarLoopResult]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2020-11-29 22:15:32,093 INFO L277 CegarLoopResult]: At program point L42-3(lines 42 43) the Hoare annotation is: true [2020-11-29 22:15:32,093 INFO L274 CegarLoopResult]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2020-11-29 22:15:32,093 INFO L274 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-11-29 22:15:32,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:15:32 BoogieIcfgContainer [2020-11-29 22:15:32,101 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:15:32,102 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:15:32,102 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:15:32,102 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:15:32,103 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:15:30" (3/4) ... [2020-11-29 22:15:32,106 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 22:15:32,119 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-29 22:15:32,119 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 22:15:32,120 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:15:32,120 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:15:32,179 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d77ce214-52f5-4573-92bf-feb42e925c99/bin/uautomizer/witness.graphml [2020-11-29 22:15:32,180 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:15:32,181 INFO L168 Benchmark]: Toolchain (without parser) took 3001.94 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 64.7 MB in the beginning and 89.7 MB in the end (delta: -25.0 MB). Peak memory consumption was 33.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:32,182 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 51.9 MB in the beginning and 51.9 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:15:32,183 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.51 ms. Allocated memory is still 94.4 MB. Free memory was 64.5 MB in the beginning and 71.2 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:32,183 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.83 ms. Allocated memory is still 94.4 MB. Free memory was 71.2 MB in the beginning and 69.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:32,184 INFO L168 Benchmark]: Boogie Preprocessor took 32.43 ms. Allocated memory is still 94.4 MB. Free memory was 69.5 MB in the beginning and 68.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:32,185 INFO L168 Benchmark]: RCFGBuilder took 492.05 ms. Allocated memory is still 94.4 MB. Free memory was 68.0 MB in the beginning and 51.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:32,185 INFO L168 Benchmark]: TraceAbstraction took 1969.30 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 50.9 MB in the beginning and 53.6 MB in the end (delta: -2.7 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:32,186 INFO L168 Benchmark]: Witness Printer took 77.92 ms. Allocated memory is still 113.2 MB. Free memory was 53.5 MB in the beginning and 89.7 MB in the end (delta: -36.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:32,189 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 51.9 MB in the beginning and 51.9 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.51 ms. Allocated memory is still 94.4 MB. Free memory was 64.5 MB in the beginning and 71.2 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.83 ms. Allocated memory is still 94.4 MB. Free memory was 71.2 MB in the beginning and 69.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.43 ms. Allocated memory is still 94.4 MB. Free memory was 69.5 MB in the beginning and 68.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 492.05 ms. Allocated memory is still 94.4 MB. Free memory was 68.0 MB in the beginning and 51.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1969.30 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 50.9 MB in the beginning and 53.6 MB in the end (delta: -2.7 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. * Witness Printer took 77.92 ms. Allocated memory is still 113.2 MB. Free memory was 53.5 MB in the beginning and 89.7 MB in the end (delta: -36.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 38 SDslu, 100 SDs, 0 SdLazy, 72 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 19 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 142 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 136 ConstructedInterpolants, 0 QuantifiedInterpolants, 4290 SizeOfPredicates, 6 NumberOfNonLiveVariables, 180 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 14/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...