./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 31d0c4253184c01eb9f9573658b07bed7aa94585 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:58:50,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:58:50,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:58:50,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:58:50,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:58:50,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:58:50,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:58:50,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:58:50,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:58:50,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:58:50,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:58:50,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:58:50,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:58:50,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:58:50,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:58:50,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:58:50,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:58:50,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:58:50,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:58:50,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:58:50,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:58:50,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:58:50,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:58:50,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:58:50,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:58:50,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:58:50,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:58:50,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:58:50,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:58:50,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:58:50,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:58:50,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:58:50,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:58:50,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:58:50,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:58:50,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:58:50,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:58:50,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:58:50,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:58:50,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:58:50,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:58:50,343 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 12:58:50,386 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:58:50,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:58:50,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:58:50,388 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:58:50,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:58:50,388 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:58:50,389 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:58:50,389 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:58:50,389 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:58:50,389 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:58:50,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:58:50,390 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:58:50,391 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:58:50,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:58:50,391 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:58:50,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:58:50,392 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 12:58:50,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:58:50,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:58:50,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:58:50,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:58:50,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:58:50,393 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 12:58:50,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:58:50,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:58:50,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:58:50,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:58:50,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:58:50,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:58:50,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:58:50,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:58:50,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:58:50,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:58:50,396 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:58:50,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:58:50,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:58:50,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:58:50,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:58:50,397 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31d0c4253184c01eb9f9573658b07bed7aa94585 [2020-11-22 12:58:50,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:58:50,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:58:50,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:58:50,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:58:50,663 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:58:50,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2020-11-22 12:58:50,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/data/98e525421/6f0a6e89b34d409fb0e4400c7f74d0c8/FLAG56d32efe4 [2020-11-22 12:58:51,237 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:58:51,238 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2020-11-22 12:58:51,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/data/98e525421/6f0a6e89b34d409fb0e4400c7f74d0c8/FLAG56d32efe4 [2020-11-22 12:58:51,648 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/data/98e525421/6f0a6e89b34d409fb0e4400c7f74d0c8 [2020-11-22 12:58:51,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:58:51,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:58:51,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:58:51,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:58:51,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:58:51,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5528b285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51, skipping insertion in model container [2020-11-22 12:58:51,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:58:51,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:58:51,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:58:51,853 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:58:51,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:58:51,877 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:58:51,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51 WrapperNode [2020-11-22 12:58:51,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:58:51,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:58:51,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:58:51,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:58:51,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:58:51,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:58:51,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:58:51,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:58:51,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... [2020-11-22 12:58:51,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:58:51,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:58:51,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:58:51,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:58:51,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/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 [2020-11-22 12:58:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:58:52,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:58:52,201 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:58:52,202 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-22 12:58:52,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:58:52 BoogieIcfgContainer [2020-11-22 12:58:52,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:58:52,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:58:52,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:58:52,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:58:52,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:58:51" (1/3) ... [2020-11-22 12:58:52,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9fa8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:58:52, skipping insertion in model container [2020-11-22 12:58:52,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:51" (2/3) ... [2020-11-22 12:58:52,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9fa8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:58:52, skipping insertion in model container [2020-11-22 12:58:52,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:58:52" (3/3) ... [2020-11-22 12:58:52,237 INFO L111 eAbstractionObserver]: Analyzing ICFG Urban-WST2013-Fig2.c [2020-11-22 12:58:52,248 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:58:52,252 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-22 12:58:52,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 12:58:52,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:58:52,288 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:58:52,288 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:58:52,288 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:58:52,288 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:58:52,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:58:52,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:58:52,289 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:58:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-22 12:58:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:58:52,307 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:52,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:58:52,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:58:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:52,314 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2020-11-22 12:58:52,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:52,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816459051] [2020-11-22 12:58:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:52,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816459051] [2020-11-22 12:58:52,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:52,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:58:52,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742230205] [2020-11-22 12:58:52,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:58:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:52,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:58:52,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:58:52,490 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-11-22 12:58:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:52,537 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-11-22 12:58:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:58:52,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-22 12:58:52,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:52,546 INFO L225 Difference]: With dead ends: 14 [2020-11-22 12:58:52,546 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 12:58:52,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:58:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 12:58:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-11-22 12:58:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-22 12:58:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-22 12:58:52,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 4 [2020-11-22 12:58:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:52,578 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-22 12:58:52,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:58:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-22 12:58:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:58:52,578 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:52,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:58:52,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:58:52,579 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:58:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:52,580 INFO L82 PathProgramCache]: Analyzing trace with hash 964251, now seen corresponding path program 1 times [2020-11-22 12:58:52,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:52,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373069919] [2020-11-22 12:58:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:52,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373069919] [2020-11-22 12:58:52,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:52,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:58:52,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987173051] [2020-11-22 12:58:52,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:58:52,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:58:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:58:52,621 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-11-22 12:58:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:52,668 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-11-22 12:58:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:58:52,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-22 12:58:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:52,670 INFO L225 Difference]: With dead ends: 22 [2020-11-22 12:58:52,670 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 12:58:52,671 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 [2020-11-22 12:58:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 12:58:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-22 12:58:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-22 12:58:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-22 12:58:52,675 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 4 [2020-11-22 12:58:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:52,675 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-22 12:58:52,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:58:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-22 12:58:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 12:58:52,676 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:52,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:58:52,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:58:52,677 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:58:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:52,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1360165828, now seen corresponding path program 1 times [2020-11-22 12:58:52,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:52,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608643090] [2020-11-22 12:58:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608643090] [2020-11-22 12:58:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710169292] [2020-11-22 12:58:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/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 [2020-11-22 12:58:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 12:58:52,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:58:52,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:58:52,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:58:52,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 6 [2020-11-22 12:58:52,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172234535] [2020-11-22 12:58:52,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:58:52,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:58:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:58:52,823 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-11-22 12:58:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:52,851 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-11-22 12:58:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:58:52,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 12:58:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:52,852 INFO L225 Difference]: With dead ends: 14 [2020-11-22 12:58:52,852 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 12:58:52,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:58:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 12:58:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-22 12:58:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 12:58:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-22 12:58:52,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2020-11-22 12:58:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:52,856 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-22 12:58:52,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:58:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-22 12:58:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:58:52,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:52,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-22 12:58:53,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-22 12:58:53,058 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:58:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash 784510025, now seen corresponding path program 1 times [2020-11-22 12:58:53,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:53,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769069562] [2020-11-22 12:58:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:58:53,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769069562] [2020-11-22 12:58:53,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:53,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:58:53,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828124140] [2020-11-22 12:58:53,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:58:53,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:53,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:58:53,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:58:53,107 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-11-22 12:58:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:53,150 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-22 12:58:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:58:53,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-22 12:58:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:53,151 INFO L225 Difference]: With dead ends: 12 [2020-11-22 12:58:53,151 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 12:58:53,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:58:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 12:58:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2020-11-22 12:58:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-22 12:58:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-22 12:58:53,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2020-11-22 12:58:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:53,155 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-22 12:58:53,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:58:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-22 12:58:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:58:53,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:53,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:58:53,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:58:53,156 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:58:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 784532352, now seen corresponding path program 1 times [2020-11-22 12:58:53,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:53,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016708371] [2020-11-22 12:58:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:53,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016708371] [2020-11-22 12:58:53,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544774694] [2020-11-22 12:58:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/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 [2020-11-22 12:58:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 12:58:53,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:58:53,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:58:53,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:58:53,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [4] total 6 [2020-11-22 12:58:53,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963902721] [2020-11-22 12:58:53,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:58:53,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:53,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:58:53,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:58:53,264 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2020-11-22 12:58:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:53,283 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-22 12:58:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:58:53,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 12:58:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:53,284 INFO L225 Difference]: With dead ends: 9 [2020-11-22 12:58:53,284 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:58:53,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:58:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:58:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:58:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:58:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:58:53,285 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2020-11-22 12:58:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:53,285 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:58:53,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:58:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:58:53,286 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:58:53,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:53,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:58:53,513 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-11-22 12:58:53,513 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:58:53,513 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2020-11-22 12:58:53,513 INFO L270 CegarLoopResult]: At program point L21-2(lines 21 23) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x2~0 10) (<= 0 (+ ULTIMATE.start_main_~x1~0 2147483648)) (<= ULTIMATE.start_main_~x1~0 10)) [2020-11-22 12:58:53,513 INFO L274 CegarLoopResult]: For program point L21-3(lines 21 23) no Hoare annotation was computed. [2020-11-22 12:58:53,514 INFO L270 CegarLoopResult]: At program point L19-2(lines 19 25) the Hoare annotation is: (<= 0 (+ ULTIMATE.start_main_~x1~0 2147483648)) [2020-11-22 12:58:53,514 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-11-22 12:58:53,514 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2020-11-22 12:58:53,514 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:58:53,514 INFO L274 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-11-22 12:58:53,514 INFO L274 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-11-22 12:58:53,514 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-11-22 12:58:53,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:58:53 BoogieIcfgContainer [2020-11-22 12:58:53,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:58:53,541 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:58:53,541 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:58:53,542 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:58:53,542 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:58:52" (3/4) ... [2020-11-22 12:58:53,545 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:58:53,554 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-22 12:58:53,554 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:58:53,555 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:58:53,590 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_efa7b992-13b9-4196-9a46-3b266f85e7ab/bin/utaipan/witness.graphml [2020-11-22 12:58:53,590 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:58:53,592 INFO L168 Benchmark]: Toolchain (without parser) took 1938.50 ms. Allocated memory is still 123.7 MB. Free memory was 95.6 MB in the beginning and 85.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:53,592 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:58:53,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.08 ms. Allocated memory is still 123.7 MB. Free memory was 95.2 MB in the beginning and 101.9 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:53,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.18 ms. Allocated memory is still 123.7 MB. Free memory was 101.9 MB in the beginning and 100.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:58:53,594 INFO L168 Benchmark]: Boogie Preprocessor took 27.58 ms. Allocated memory is still 123.7 MB. Free memory was 100.6 MB in the beginning and 99.8 MB in the end (delta: 807.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:53,595 INFO L168 Benchmark]: RCFGBuilder took 256.89 ms. Allocated memory is still 123.7 MB. Free memory was 99.8 MB in the beginning and 88.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:53,595 INFO L168 Benchmark]: TraceAbstraction took 1335.18 ms. Allocated memory is still 123.7 MB. Free memory was 88.5 MB in the beginning and 87.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 3.9 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:53,596 INFO L168 Benchmark]: Witness Printer took 49.08 ms. Allocated memory is still 123.7 MB. Free memory was 87.3 MB in the beginning and 85.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:53,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 224.08 ms. Allocated memory is still 123.7 MB. Free memory was 95.2 MB in the beginning and 101.9 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 39.18 ms. Allocated memory is still 123.7 MB. Free memory was 101.9 MB in the beginning and 100.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.58 ms. Allocated memory is still 123.7 MB. Free memory was 100.6 MB in the beginning and 99.8 MB in the end (delta: 807.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 256.89 ms. Allocated memory is still 123.7 MB. Free memory was 99.8 MB in the beginning and 88.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1335.18 ms. Allocated memory is still 123.7 MB. Free memory was 88.5 MB in the beginning and 87.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 3.9 MB. Max. memory is 16.1 GB. * Witness Printer took 49.08 ms. Allocated memory is still 123.7 MB. Free memory was 87.3 MB in the beginning and 85.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 <= x1 + 2147483648 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (x2 <= 10 && 0 <= x1 + 2147483648) && x1 <= 10 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 13 SDslu, 8 SDs, 0 SdLazy, 31 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=2, 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 5 NumberOfFragments, 17 HoareAnnotationTreeSize, 2 FomulaSimplifications, 19 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 984 SizeOfPredicates, 1 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 7/9 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...