./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/lu.cmp.c --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_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/lu.cmp.c -s /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 13:04:12,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:04:12,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:04:12,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:04:12,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:04:12,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:04:12,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:04:12,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:04:12,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:04:12,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:04:12,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:04:12,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:04:12,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:04:12,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:04:12,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:04:12,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:04:12,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:04:12,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:04:12,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:04:12,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:04:12,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:04:12,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:04:12,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:04:12,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:04:12,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:04:12,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:04:12,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:04:12,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:04:12,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:04:12,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:04:12,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:04:12,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:04:12,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:04:12,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:04:12,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:04:12,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:04:12,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:04:12,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:04:12,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:04:12,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:04:12,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:04:12,724 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:04:12,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:04:12,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:04:12,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:04:12,751 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:04:12,752 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:04:12,752 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:04:12,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:04:12,752 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:04:12,752 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:04:12,753 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:04:12,753 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:04:12,753 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:04:12,753 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:04:12,753 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:04:12,754 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:04:12,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:04:12,754 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:04:12,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:04:12,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:04:12,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:04:12,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:04:12,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:04:12,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:04:12,756 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:04:12,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:04:12,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:04:12,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:04:12,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:04:12,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:04:12,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:04:12,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:04:12,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:04:12,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:04:12,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:04:12,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:04:12,758 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:04:12,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:04:12,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:04:12,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:04:12,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:04:12,759 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_26955788-f8d8-4591-b411-7a0a18384b2c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 640282f6b7135e6e195eda6d48d5761dd6ed3cc4 [2020-11-22 13:04:13,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:04:13,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:04:13,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:04:13,050 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:04:13,052 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:04:13,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/../../sv-benchmarks/c/loops/lu.cmp.c [2020-11-22 13:04:13,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/data/1bad6d45b/4165a031614442049ee3c9dd27c030f0/FLAG57c40250b [2020-11-22 13:04:13,610 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:04:13,611 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/sv-benchmarks/c/loops/lu.cmp.c [2020-11-22 13:04:13,627 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/data/1bad6d45b/4165a031614442049ee3c9dd27c030f0/FLAG57c40250b [2020-11-22 13:04:13,927 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/data/1bad6d45b/4165a031614442049ee3c9dd27c030f0 [2020-11-22 13:04:13,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:04:13,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:04:13,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:13,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:04:13,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:04:13,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:13" (1/1) ... [2020-11-22 13:04:13,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d21c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:13, skipping insertion in model container [2020-11-22 13:04:13,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:13" (1/1) ... [2020-11-22 13:04:13,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:04:13,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:04:14,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:14,221 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:04:14,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:14,279 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:04:14,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14 WrapperNode [2020-11-22 13:04:14,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:14,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:14,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:04:14,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:04:14,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... [2020-11-22 13:04:14,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... [2020-11-22 13:04:14,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:14,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:04:14,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:04:14,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:04:14,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... [2020-11-22 13:04:14,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... [2020-11-22 13:04:14,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... [2020-11-22 13:04:14,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... [2020-11-22 13:04:14,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... [2020-11-22 13:04:14,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... [2020-11-22 13:04:14,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... [2020-11-22 13:04:14,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:04:14,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:04:14,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:04:14,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:04:14,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/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 13:04:14,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:04:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:04:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-22 13:04:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-22 13:04:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:04:14,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:04:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:04:15,317 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:04:15,318 INFO L298 CfgBuilder]: Removed 23 assume(true) statements. [2020-11-22 13:04:15,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:15 BoogieIcfgContainer [2020-11-22 13:04:15,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:04:15,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:04:15,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:04:15,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:04:15,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:04:13" (1/3) ... [2020-11-22 13:04:15,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cedacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:04:15, skipping insertion in model container [2020-11-22 13:04:15,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:14" (2/3) ... [2020-11-22 13:04:15,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cedacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:04:15, skipping insertion in model container [2020-11-22 13:04:15,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:15" (3/3) ... [2020-11-22 13:04:15,328 INFO L111 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-11-22 13:04:15,339 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:04:15,344 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:04:15,355 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:04:15,378 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:04:15,379 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:04:15,379 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:04:15,379 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:04:15,379 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:04:15,379 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:04:15,380 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:04:15,380 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:04:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-22 13:04:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:04:15,397 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:15,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:04:15,398 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:04:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash 225862037, now seen corresponding path program 1 times [2020-11-22 13:04:15,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:15,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859971034] [2020-11-22 13:04:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:15,588 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 13:04:15,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859971034] [2020-11-22 13:04:15,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:15,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:04:15,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751964176] [2020-11-22 13:04:15,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:04:15,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:04:15,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:04:15,609 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2020-11-22 13:04:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:15,663 INFO L93 Difference]: Finished difference Result 44 states and 73 transitions. [2020-11-22 13:04:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:04:15,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-22 13:04:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:15,681 INFO L225 Difference]: With dead ends: 44 [2020-11-22 13:04:15,689 INFO L226 Difference]: Without dead ends: 8 [2020-11-22 13:04:15,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:04:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-22 13:04:15,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-22 13:04:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-22 13:04:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-11-22 13:04:15,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2020-11-22 13:04:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:15,723 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-22 13:04:15,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:04:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-11-22 13:04:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:04:15,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:15,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:04:15,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:04:15,725 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:04:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:15,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1587632949, now seen corresponding path program 1 times [2020-11-22 13:04:15,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:15,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826630563] [2020-11-22 13:04:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:15,808 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 13:04:15,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826630563] [2020-11-22 13:04:15,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:15,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:04:15,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948268475] [2020-11-22 13:04:15,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:04:15,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:15,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:04:15,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:04:15,812 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2020-11-22 13:04:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:15,865 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-11-22 13:04:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:04:15,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-22 13:04:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:15,866 INFO L225 Difference]: With dead ends: 15 [2020-11-22 13:04:15,866 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 13:04:15,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:04:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 13:04:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-22 13:04:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 13:04:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-22 13:04:15,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2020-11-22 13:04:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:15,872 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-22 13:04:15,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:04:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-22 13:04:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:04:15,873 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:15,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2020-11-22 13:04:15,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:04:15,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:04:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:15,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1408452529, now seen corresponding path program 1 times [2020-11-22 13:04:15,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:15,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070486671] [2020-11-22 13:04:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:04:15,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070486671] [2020-11-22 13:04:15,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768955464] [2020-11-22 13:04:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/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 13:04:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-22 13:04:16,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:04:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:04:16,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:04:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:04:16,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837648435] [2020-11-22 13:04:16,338 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:04:16,338 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:04:16,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:04:16,349 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:04:16,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:04:17,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:04:17,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:04:17,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:04:17,887 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-22 13:04:17,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:04:17,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2020-11-22 13:04:17,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244611249] [2020-11-22 13:04:17,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-22 13:04:17,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:17,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-22 13:04:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:04:17,890 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 11 states. [2020-11-22 13:04:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:18,270 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2020-11-22 13:04:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-22 13:04:18,273 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-11-22 13:04:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:18,273 INFO L225 Difference]: With dead ends: 35 [2020-11-22 13:04:18,273 INFO L226 Difference]: Without dead ends: 27 [2020-11-22 13:04:18,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-11-22 13:04:18,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-22 13:04:18,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-11-22 13:04:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-22 13:04:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-22 13:04:18,281 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2020-11-22 13:04:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:18,281 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-22 13:04:18,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-22 13:04:18,281 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-22 13:04:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-22 13:04:18,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:18,285 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 2, 2, 1, 1, 1] [2020-11-22 13:04:18,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-22 13:04:18,511 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:04:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:18,511 INFO L82 PathProgramCache]: Analyzing trace with hash -34221475, now seen corresponding path program 2 times [2020-11-22 13:04:18,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:18,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58019862] [2020-11-22 13:04:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-22 13:04:18,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58019862] [2020-11-22 13:04:18,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694194251] [2020-11-22 13:04:18,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/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 13:04:18,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-22 13:04:18,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:04:18,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 13:04:18,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:04:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-22 13:04:18,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:04:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-22 13:04:18,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778050619] [2020-11-22 13:04:18,856 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:04:18,857 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:04:18,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:04:18,858 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:04:18,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:04:19,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:04:19,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:04:19,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:04:19,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:04:20,047 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-22 13:04:20,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:04:20,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-11-22 13:04:20,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976551251] [2020-11-22 13:04:20,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:04:20,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:20,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:04:20,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:04:20,049 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-11-22 13:04:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:20,108 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-22 13:04:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:04:20,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-11-22 13:04:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:20,109 INFO L225 Difference]: With dead ends: 26 [2020-11-22 13:04:20,109 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:04:20,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:04:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:04:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:04:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:04:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:04:20,111 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-11-22 13:04:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:20,111 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:04:20,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:04:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:04:20,111 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:04:20,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:04:20,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:04:20,495 INFO L270 CegarLoopResult]: At program point L93-3(lines 93 104) the Hoare annotation is: (let ((.cse0 (<= 5 ULTIMATE.start_main_~n~0)) (.cse1 (<= ULTIMATE.start_main_~n~0 5))) (or (and .cse0 (< ULTIMATE.start_main_~i~0 50) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1) (and (= ULTIMATE.start_main_~i~0 0) .cse0 .cse1))) [2020-11-22 13:04:20,495 INFO L270 CegarLoopResult]: At program point L118-3(lines 118 136) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,495 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:04:20,495 INFO L270 CegarLoopResult]: At program point L153(lines 111 155) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,495 INFO L274 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-11-22 13:04:20,495 INFO L270 CegarLoopResult]: At program point L129-3(lines 129 135) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,496 INFO L270 CegarLoopResult]: At program point L96-3(lines 96 101) the Hoare annotation is: (let ((.cse0 (<= 5 ULTIMATE.start_main_~n~0)) (.cse1 (<= ULTIMATE.start_main_~n~0 5))) (or (and (<= ULTIMATE.start_main_~i~0 5) .cse0 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1) (and (= ULTIMATE.start_main_~i~0 0) .cse0 .cse1))) [2020-11-22 13:04:20,496 INFO L270 CegarLoopResult]: At program point L121-3(lines 121 128) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,496 INFO L270 CegarLoopResult]: At program point L146-3(lines 146 152) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,496 INFO L270 CegarLoopResult]: At program point L138-3(lines 138 144) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,496 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-11-22 13:04:20,496 INFO L270 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: (and (<= ULTIMATE.start_main_~i~0 5) (<= 5 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~n~0 5)) [2020-11-22 13:04:20,496 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-22 13:04:20,496 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 13:04:20,496 INFO L270 CegarLoopResult]: At program point L132-3(lines 132 133) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,496 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:04:20,496 INFO L274 CegarLoopResult]: For program point L124(lines 124 126) no Hoare annotation was computed. [2020-11-22 13:04:20,497 INFO L274 CegarLoopResult]: For program point L124-1(lines 124 126) no Hoare annotation was computed. [2020-11-22 13:04:20,497 INFO L270 CegarLoopResult]: At program point L149-3(lines 149 150) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,497 INFO L270 CegarLoopResult]: At program point L141-3(lines 141 142) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,497 INFO L270 CegarLoopResult]: At program point L125-3(lines 125 126) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~n~0) [2020-11-22 13:04:20,497 INFO L274 CegarLoopResult]: For program point L117(line 117) no Hoare annotation was computed. [2020-11-22 13:04:20,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:04:20 BoogieIcfgContainer [2020-11-22 13:04:20,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:04:20,522 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:04:20,522 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:04:20,522 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:04:20,522 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:15" (3/4) ... [2020-11-22 13:04:20,526 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:04:20,542 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 33 nodes and edges [2020-11-22 13:04:20,547 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2020-11-22 13:04:20,548 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:04:20,549 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:04:20,615 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_26955788-f8d8-4591-b411-7a0a18384b2c/bin/utaipan/witness.graphml [2020-11-22 13:04:20,615 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:04:20,616 INFO L168 Benchmark]: Toolchain (without parser) took 6683.52 ms. Allocated memory was 115.3 MB in the beginning and 186.6 MB in the end (delta: 71.3 MB). Free memory was 92.6 MB in the beginning and 106.2 MB in the end (delta: -13.6 MB). Peak memory consumption was 57.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:20,617 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 53.7 MB in the beginning and 53.7 MB in the end (delta: 73.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:04:20,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.93 ms. Allocated memory is still 115.3 MB. Free memory was 92.3 MB in the beginning and 88.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:20,617 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.59 ms. Allocated memory is still 115.3 MB. Free memory was 88.9 MB in the beginning and 86.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:20,618 INFO L168 Benchmark]: Boogie Preprocessor took 36.79 ms. Allocated memory is still 115.3 MB. Free memory was 86.7 MB in the beginning and 84.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:20,619 INFO L168 Benchmark]: RCFGBuilder took 951.34 ms. Allocated memory was 115.3 MB in the beginning and 155.2 MB in the end (delta: 39.8 MB). Free memory was 84.7 MB in the beginning and 124.6 MB in the end (delta: -39.9 MB). Peak memory consumption was 45.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:20,619 INFO L168 Benchmark]: TraceAbstraction took 5199.45 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 124.6 MB in the beginning and 110.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 45.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:20,620 INFO L168 Benchmark]: Witness Printer took 93.96 ms. Allocated memory is still 186.6 MB. Free memory was 110.4 MB in the beginning and 106.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:20,622 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 53.7 MB in the beginning and 53.7 MB in the end (delta: 73.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 345.93 ms. Allocated memory is still 115.3 MB. Free memory was 92.3 MB in the beginning and 88.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.59 ms. Allocated memory is still 115.3 MB. Free memory was 88.9 MB in the beginning and 86.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.79 ms. Allocated memory is still 115.3 MB. Free memory was 86.7 MB in the beginning and 84.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 951.34 ms. Allocated memory was 115.3 MB in the beginning and 155.2 MB in the end (delta: 39.8 MB). Free memory was 84.7 MB in the beginning and 124.6 MB in the end (delta: -39.9 MB). Peak memory consumption was 45.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5199.45 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 124.6 MB in the beginning and 110.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 45.5 MB. Max. memory is 16.1 GB. * Witness Printer took 93.96 ms. Allocated memory is still 186.6 MB. Free memory was 110.4 MB in the beginning and 106.2 MB in the end (delta: 4.2 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: 3]: 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: 146]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 93]: Loop Invariant Derived loop invariant: (((5 <= n && i < 50) && 1 <= cond) && n <= 5) || ((i == 0 && 5 <= n) && n <= 5) - InvariantResult [Line: 125]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 138]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 149]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 96]: Loop Invariant Derived loop invariant: (((i <= 5 && 5 <= n) && 1 <= cond) && n <= 5) || ((i == 0 && 5 <= n) && n <= 5) - InvariantResult [Line: 118]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 129]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 141]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 121]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 132]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 111]: Loop Invariant Derived loop invariant: 5 <= n - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: ((i <= 5 && 5 <= n) && 1 <= cond) && n <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.9s, OverallIterations: 4, TraceHistogramMax: 12, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 78 SDslu, 49 SDs, 0 SdLazy, 76 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 13 PreInvPairs, 43 NumberOfFragments, 91 HoareAnnotationTreeSize, 13 FomulaSimplifications, 397 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 13 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 83 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 5892 SizeOfPredicates, 7 NumberOfNonLiveVariables, 167 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 197/361 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...