./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label29.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_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c -s /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/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 4a846042d2e3a90f9afd312e363335049aaf47f7 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:35:40,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:35:40,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:35:40,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:35:40,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:35:40,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:35:40,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:35:40,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:35:40,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:35:40,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:35:40,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:35:40,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:35:40,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:35:40,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:35:40,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:35:40,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:35:40,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:35:40,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:35:40,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:35:40,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:35:40,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:35:40,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:35:40,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:35:40,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:35:40,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:35:40,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:35:40,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:35:40,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:35:40,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:35:40,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:35:40,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:35:40,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:35:40,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:35:40,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:35:40,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:35:40,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:35:40,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:35:40,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:35:40,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:35:40,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:35:40,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:35:40,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:35:40,957 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:35:40,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:35:40,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:35:40,959 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:35:40,959 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:35:40,959 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:35:40,959 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:35:40,960 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:35:40,960 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:35:40,960 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:35:40,960 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:35:40,961 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:35:40,961 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:35:40,961 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:35:40,961 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:35:40,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:35:40,963 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:35:40,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:35:40,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:35:40,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:35:40,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:35:40,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:35:40,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:35:40,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:35:40,964 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:35:40,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:35:40,965 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:35:40,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:35:40,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:35:40,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:35:40,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:35:40,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:35:40,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:35:40,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:35:40,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:35:40,967 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:35:40,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:35:40,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:35:40,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:35:40,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:35:40,968 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_66a942cc-f3f1-4941-bde2-92497984e467/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a846042d2e3a90f9afd312e363335049aaf47f7 [2020-11-28 07:35:41,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:35:41,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:35:41,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:35:41,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:35:41,391 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:35:41,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2020-11-28 07:35:41,484 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/data/817508bed/231f928b915945e6b445059cdbeb2211/FLAGc171684b4 [2020-11-28 07:35:42,129 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:35:42,129 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2020-11-28 07:35:42,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/data/817508bed/231f928b915945e6b445059cdbeb2211/FLAGc171684b4 [2020-11-28 07:35:42,404 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/data/817508bed/231f928b915945e6b445059cdbeb2211 [2020-11-28 07:35:42,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:35:42,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:35:42,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:35:42,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:35:42,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:35:42,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329d9e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42, skipping insertion in model container [2020-11-28 07:35:42,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:35:42,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:35:42,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:35:42,957 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:35:43,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:35:43,129 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:35:43,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43 WrapperNode [2020-11-28 07:35:43,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:35:43,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:35:43,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:35:43,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:35:43,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... [2020-11-28 07:35:43,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... [2020-11-28 07:35:43,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:35:43,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:35:43,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:35:43,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:35:43,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... [2020-11-28 07:35:43,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... [2020-11-28 07:35:43,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... [2020-11-28 07:35:43,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... [2020-11-28 07:35:43,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... [2020-11-28 07:35:43,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... [2020-11-28 07:35:43,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... [2020-11-28 07:35:43,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:35:43,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:35:43,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:35:43,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:35:43,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/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 [2020-11-28 07:35:43,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:35:43,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:35:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:35:43,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:35:45,495 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:35:45,495 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:35:45,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:45 BoogieIcfgContainer [2020-11-28 07:35:45,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:35:45,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:35:45,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:35:45,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:35:45,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:35:42" (1/3) ... [2020-11-28 07:35:45,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f8a658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:35:45, skipping insertion in model container [2020-11-28 07:35:45,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:43" (2/3) ... [2020-11-28 07:35:45,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f8a658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:35:45, skipping insertion in model container [2020-11-28 07:35:45,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:45" (3/3) ... [2020-11-28 07:35:45,506 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label29.c [2020-11-28 07:35:45,517 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:35:45,522 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:35:45,534 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:35:45,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:35:45,569 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:35:45,569 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:35:45,569 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:35:45,569 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:35:45,570 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:35:45,570 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:35:45,570 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:35:45,590 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:35:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:35:45,597 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:45,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:45,598 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:45,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1520707693, now seen corresponding path program 1 times [2020-11-28 07:35:45,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:45,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033555520] [2020-11-28 07:35:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:45,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033555520] [2020-11-28 07:35:45,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:45,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:35:45,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728184425] [2020-11-28 07:35:45,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:45,982 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:35:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:46,567 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:35:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:46,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:35:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:46,593 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:35:46,598 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:35:46,601 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 [2020-11-28 07:35:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:35:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:35:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:35:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 265 transitions. [2020-11-28 07:35:46,670 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 265 transitions. Word has length 71 [2020-11-28 07:35:46,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:46,671 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 265 transitions. [2020-11-28 07:35:46,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:46,671 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 265 transitions. [2020-11-28 07:35:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-28 07:35:46,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:46,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:46,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:35:46,675 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:46,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1975138494, now seen corresponding path program 1 times [2020-11-28 07:35:46,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:46,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446201470] [2020-11-28 07:35:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:46,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446201470] [2020-11-28 07:35:46,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:46,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:35:46,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019409759] [2020-11-28 07:35:46,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:46,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:46,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:46,796 INFO L87 Difference]: Start difference. First operand 145 states and 265 transitions. Second operand 3 states. [2020-11-28 07:35:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:47,284 INFO L93 Difference]: Finished difference Result 431 states and 792 transitions. [2020-11-28 07:35:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:47,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-28 07:35:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:47,287 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:35:47,288 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:35:47,289 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 [2020-11-28 07:35:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:35:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:35:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:35:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 485 transitions. [2020-11-28 07:35:47,313 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 485 transitions. Word has length 77 [2020-11-28 07:35:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:47,313 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 485 transitions. [2020-11-28 07:35:47,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 485 transitions. [2020-11-28 07:35:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-28 07:35:47,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:47,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:47,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:35:47,318 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:47,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:47,319 INFO L82 PathProgramCache]: Analyzing trace with hash 790494617, now seen corresponding path program 1 times [2020-11-28 07:35:47,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:47,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715199057] [2020-11-28 07:35:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:47,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715199057] [2020-11-28 07:35:47,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:47,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:35:47,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128426613] [2020-11-28 07:35:47,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:47,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:47,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:47,448 INFO L87 Difference]: Start difference. First operand 287 states and 485 transitions. Second operand 3 states. [2020-11-28 07:35:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:47,964 INFO L93 Difference]: Finished difference Result 857 states and 1452 transitions. [2020-11-28 07:35:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:47,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-11-28 07:35:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:47,969 INFO L225 Difference]: With dead ends: 857 [2020-11-28 07:35:47,969 INFO L226 Difference]: Without dead ends: 571 [2020-11-28 07:35:47,971 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 [2020-11-28 07:35:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-28 07:35:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-11-28 07:35:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:35:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 895 transitions. [2020-11-28 07:35:48,017 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 895 transitions. Word has length 92 [2020-11-28 07:35:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:48,018 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 895 transitions. [2020-11-28 07:35:48,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 895 transitions. [2020-11-28 07:35:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-28 07:35:48,034 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:48,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:48,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:35:48,035 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:48,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:48,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1677273898, now seen corresponding path program 1 times [2020-11-28 07:35:48,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:48,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150834725] [2020-11-28 07:35:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 07:35:48,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150834725] [2020-11-28 07:35:48,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:48,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:35:48,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788030183] [2020-11-28 07:35:48,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:48,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:48,139 INFO L87 Difference]: Start difference. First operand 571 states and 895 transitions. Second operand 3 states. [2020-11-28 07:35:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:48,655 INFO L93 Difference]: Finished difference Result 1354 states and 2147 transitions. [2020-11-28 07:35:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:48,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-11-28 07:35:48,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:48,659 INFO L225 Difference]: With dead ends: 1354 [2020-11-28 07:35:48,660 INFO L226 Difference]: Without dead ends: 784 [2020-11-28 07:35:48,661 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 [2020-11-28 07:35:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-28 07:35:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2020-11-28 07:35:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:35:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1181 transitions. [2020-11-28 07:35:48,694 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1181 transitions. Word has length 99 [2020-11-28 07:35:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:48,696 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1181 transitions. [2020-11-28 07:35:48,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1181 transitions. [2020-11-28 07:35:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-28 07:35:48,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:48,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:48,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:35:48,700 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash -448732172, now seen corresponding path program 1 times [2020-11-28 07:35:48,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:48,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30297823] [2020-11-28 07:35:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-28 07:35:48,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30297823] [2020-11-28 07:35:48,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:48,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:35:48,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830244310] [2020-11-28 07:35:48,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:48,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:48,833 INFO L87 Difference]: Start difference. First operand 784 states and 1181 transitions. Second operand 3 states. [2020-11-28 07:35:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:49,322 INFO L93 Difference]: Finished difference Result 1567 states and 2361 transitions. [2020-11-28 07:35:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:49,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-11-28 07:35:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:49,328 INFO L225 Difference]: With dead ends: 1567 [2020-11-28 07:35:49,328 INFO L226 Difference]: Without dead ends: 784 [2020-11-28 07:35:49,329 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 [2020-11-28 07:35:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-28 07:35:49,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2020-11-28 07:35:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:35:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1157 transitions. [2020-11-28 07:35:49,358 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1157 transitions. Word has length 103 [2020-11-28 07:35:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:49,358 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1157 transitions. [2020-11-28 07:35:49,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1157 transitions. [2020-11-28 07:35:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-28 07:35:49,361 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:49,361 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:49,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:35:49,362 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:49,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2031844125, now seen corresponding path program 1 times [2020-11-28 07:35:49,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:49,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425287598] [2020-11-28 07:35:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 07:35:49,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425287598] [2020-11-28 07:35:49,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:49,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:35:49,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532959830] [2020-11-28 07:35:49,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:49,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:49,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:49,458 INFO L87 Difference]: Start difference. First operand 784 states and 1157 transitions. Second operand 3 states. [2020-11-28 07:35:49,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:49,992 INFO L93 Difference]: Finished difference Result 1922 states and 2813 transitions. [2020-11-28 07:35:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:49,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-11-28 07:35:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:49,999 INFO L225 Difference]: With dead ends: 1922 [2020-11-28 07:35:49,999 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:35:50,001 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 [2020-11-28 07:35:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:35:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-28 07:35:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:35:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 862 transitions. [2020-11-28 07:35:50,034 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 862 transitions. Word has length 104 [2020-11-28 07:35:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:50,034 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 862 transitions. [2020-11-28 07:35:50,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 862 transitions. [2020-11-28 07:35:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-28 07:35:50,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:50,043 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:50,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:35:50,044 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:50,045 INFO L82 PathProgramCache]: Analyzing trace with hash -601370834, now seen corresponding path program 1 times [2020-11-28 07:35:50,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:50,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546275892] [2020-11-28 07:35:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-28 07:35:50,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546275892] [2020-11-28 07:35:50,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:50,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:35:50,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533860117] [2020-11-28 07:35:50,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:35:50,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:35:50,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:35:50,162 INFO L87 Difference]: Start difference. First operand 713 states and 862 transitions. Second operand 4 states. [2020-11-28 07:35:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:50,716 INFO L93 Difference]: Finished difference Result 1922 states and 2351 transitions. [2020-11-28 07:35:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:35:50,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-11-28 07:35:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:50,723 INFO L225 Difference]: With dead ends: 1922 [2020-11-28 07:35:50,723 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:35:50,725 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 [2020-11-28 07:35:50,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:35:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 855. [2020-11-28 07:35:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-28 07:35:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1028 transitions. [2020-11-28 07:35:50,757 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1028 transitions. Word has length 107 [2020-11-28 07:35:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:50,758 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1028 transitions. [2020-11-28 07:35:50,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:35:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1028 transitions. [2020-11-28 07:35:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-28 07:35:50,761 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:50,761 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:50,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:35:50,762 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash -704788412, now seen corresponding path program 1 times [2020-11-28 07:35:50,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:50,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462100448] [2020-11-28 07:35:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-28 07:35:50,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462100448] [2020-11-28 07:35:50,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:50,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:35:50,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205869345] [2020-11-28 07:35:50,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:50,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:50,837 INFO L87 Difference]: Start difference. First operand 855 states and 1028 transitions. Second operand 3 states. [2020-11-28 07:35:51,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:51,306 INFO L93 Difference]: Finished difference Result 2206 states and 2653 transitions. [2020-11-28 07:35:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:51,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-11-28 07:35:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:51,315 INFO L225 Difference]: With dead ends: 2206 [2020-11-28 07:35:51,315 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:35:51,317 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 [2020-11-28 07:35:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:35:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1139. [2020-11-28 07:35:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:35:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1372 transitions. [2020-11-28 07:35:51,351 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1372 transitions. Word has length 116 [2020-11-28 07:35:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:51,352 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1372 transitions. [2020-11-28 07:35:51,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1372 transitions. [2020-11-28 07:35:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-28 07:35:51,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:51,356 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:51,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:35:51,358 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:51,358 INFO L82 PathProgramCache]: Analyzing trace with hash 948507404, now seen corresponding path program 1 times [2020-11-28 07:35:51,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:51,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985725599] [2020-11-28 07:35:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-28 07:35:51,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985725599] [2020-11-28 07:35:51,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:51,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:35:51,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340613869] [2020-11-28 07:35:51,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:51,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:51,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:51,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:51,473 INFO L87 Difference]: Start difference. First operand 1139 states and 1372 transitions. Second operand 3 states. [2020-11-28 07:35:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:51,858 INFO L93 Difference]: Finished difference Result 2419 states and 2913 transitions. [2020-11-28 07:35:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:51,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-11-28 07:35:51,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:51,866 INFO L225 Difference]: With dead ends: 2419 [2020-11-28 07:35:51,866 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:35:51,870 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 [2020-11-28 07:35:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:35:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-11-28 07:35:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-28 07:35:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1532 transitions. [2020-11-28 07:35:51,905 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1532 transitions. Word has length 132 [2020-11-28 07:35:51,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:51,905 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1532 transitions. [2020-11-28 07:35:51,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1532 transitions. [2020-11-28 07:35:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-28 07:35:51,910 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:51,911 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:51,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:35:51,911 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:51,912 INFO L82 PathProgramCache]: Analyzing trace with hash -603133422, now seen corresponding path program 1 times [2020-11-28 07:35:51,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:51,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150415349] [2020-11-28 07:35:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-28 07:35:52,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150415349] [2020-11-28 07:35:52,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:52,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:35:52,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075828035] [2020-11-28 07:35:52,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:35:52,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:52,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:35:52,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:35:52,051 INFO L87 Difference]: Start difference. First operand 1281 states and 1532 transitions. Second operand 4 states. [2020-11-28 07:35:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:52,629 INFO L93 Difference]: Finished difference Result 2916 states and 3479 transitions. [2020-11-28 07:35:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:35:52,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-11-28 07:35:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:52,641 INFO L225 Difference]: With dead ends: 2916 [2020-11-28 07:35:52,642 INFO L226 Difference]: Without dead ends: 1636 [2020-11-28 07:35:52,644 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 [2020-11-28 07:35:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2020-11-28 07:35:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1494. [2020-11-28 07:35:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-11-28 07:35:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1762 transitions. [2020-11-28 07:35:52,689 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1762 transitions. Word has length 136 [2020-11-28 07:35:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:52,689 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1762 transitions. [2020-11-28 07:35:52,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:35:52,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1762 transitions. [2020-11-28 07:35:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-11-28 07:35:52,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:52,693 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:52,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:35:52,694 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:52,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1880050529, now seen corresponding path program 1 times [2020-11-28 07:35:52,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:52,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578053392] [2020-11-28 07:35:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-28 07:35:52,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578053392] [2020-11-28 07:35:52,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:52,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:35:52,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807418740] [2020-11-28 07:35:52,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:52,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:52,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:52,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:52,868 INFO L87 Difference]: Start difference. First operand 1494 states and 1762 transitions. Second operand 3 states. [2020-11-28 07:35:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:53,271 INFO L93 Difference]: Finished difference Result 3271 states and 3867 transitions. [2020-11-28 07:35:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:53,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2020-11-28 07:35:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:53,282 INFO L225 Difference]: With dead ends: 3271 [2020-11-28 07:35:53,282 INFO L226 Difference]: Without dead ends: 1707 [2020-11-28 07:35:53,285 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 [2020-11-28 07:35:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-11-28 07:35:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 997. [2020-11-28 07:35:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:35:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1186 transitions. [2020-11-28 07:35:53,320 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1186 transitions. Word has length 153 [2020-11-28 07:35:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:53,321 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1186 transitions. [2020-11-28 07:35:53,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1186 transitions. [2020-11-28 07:35:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-11-28 07:35:53,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:53,326 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:53,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:35:53,326 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:53,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1952542336, now seen corresponding path program 1 times [2020-11-28 07:35:53,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:53,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838405963] [2020-11-28 07:35:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 185 proven. 88 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:35:53,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838405963] [2020-11-28 07:35:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542498570] [2020-11-28 07:35:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/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 [2020-11-28 07:35:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:35:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-11-28 07:35:54,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-11-28 07:35:54,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:35:54,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:35:54,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886757715] [2020-11-28 07:35:54,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:54,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:54,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:54,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:35:54,412 INFO L87 Difference]: Start difference. First operand 997 states and 1186 transitions. Second operand 3 states. [2020-11-28 07:35:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:54,879 INFO L93 Difference]: Finished difference Result 2062 states and 2462 transitions. [2020-11-28 07:35:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:54,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2020-11-28 07:35:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:54,883 INFO L225 Difference]: With dead ends: 2062 [2020-11-28 07:35:54,883 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:35:54,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:35:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:35:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:35:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:35:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:35:54,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 218 [2020-11-28 07:35:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:54,886 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:35:54,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:35:54,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:35:55,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:35:55,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:35:55,335 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:35:55,335 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:35:55,336 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:35:55,337 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1))) (or (and .cse0 (<= ~a17~0 0)) (and .cse0 (not (= ~a7~0 1)) (= ~a17~0 1)) (<= ~a8~0 13))) [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point L485-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:35:55,338 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L488-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L489(line 489) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:35:55,339 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1))) (or (and .cse0 (<= ~a17~0 0)) (and .cse0 (not (= ~a7~0 1)) (= ~a17~0 1)) (<= ~a8~0 13))) [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:35:55,340 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:35:55,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:35:55 BoogieIcfgContainer [2020-11-28 07:35:55,364 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:35:55,365 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:35:55,365 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:35:55,365 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:35:55,365 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:45" (3/4) ... [2020-11-28 07:35:55,369 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:35:55,404 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-28 07:35:55,406 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:35:55,408 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:35:55,410 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:35:55,574 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_66a942cc-f3f1-4941-bde2-92497984e467/bin/utaipan/witness.graphml [2020-11-28 07:35:55,575 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:35:55,576 INFO L168 Benchmark]: Toolchain (without parser) took 13166.15 ms. Allocated memory was 79.7 MB in the beginning and 285.2 MB in the end (delta: 205.5 MB). Free memory was 46.9 MB in the beginning and 148.0 MB in the end (delta: -101.0 MB). Peak memory consumption was 103.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:55,577 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 79.7 MB. Free memory was 39.3 MB in the beginning and 39.3 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:35:55,577 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.73 ms. Allocated memory was 79.7 MB in the beginning and 109.1 MB in the end (delta: 29.4 MB). Free memory was 46.8 MB in the beginning and 70.7 MB in the end (delta: -23.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:55,578 INFO L168 Benchmark]: Boogie Procedure Inliner took 114.18 ms. Allocated memory is still 109.1 MB. Free memory was 70.7 MB in the beginning and 65.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:55,578 INFO L168 Benchmark]: Boogie Preprocessor took 110.24 ms. Allocated memory is still 109.1 MB. Free memory was 65.3 MB in the beginning and 60.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:55,579 INFO L168 Benchmark]: RCFGBuilder took 2140.47 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 60.2 MB in the beginning and 87.1 MB in the end (delta: -26.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:55,580 INFO L168 Benchmark]: TraceAbstraction took 9865.04 ms. Allocated memory was 136.3 MB in the beginning and 285.2 MB in the end (delta: 148.9 MB). Free memory was 87.1 MB in the beginning and 163.7 MB in the end (delta: -76.6 MB). Peak memory consumption was 72.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:55,580 INFO L168 Benchmark]: Witness Printer took 210.20 ms. Allocated memory is still 285.2 MB. Free memory was 163.7 MB in the beginning and 148.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:55,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 79.7 MB. Free memory was 39.3 MB in the beginning and 39.3 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 718.73 ms. Allocated memory was 79.7 MB in the beginning and 109.1 MB in the end (delta: 29.4 MB). Free memory was 46.8 MB in the beginning and 70.7 MB in the end (delta: -23.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 114.18 ms. Allocated memory is still 109.1 MB. Free memory was 70.7 MB in the beginning and 65.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 110.24 ms. Allocated memory is still 109.1 MB. Free memory was 65.3 MB in the beginning and 60.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2140.47 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 60.2 MB in the beginning and 87.1 MB in the end (delta: -26.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9865.04 ms. Allocated memory was 136.3 MB in the beginning and 285.2 MB in the end (delta: 148.9 MB). Free memory was 87.1 MB in the beginning and 163.7 MB in the end (delta: -76.6 MB). Peak memory consumption was 72.3 MB. Max. memory is 16.1 GB. * Witness Printer took 210.20 ms. Allocated memory is still 285.2 MB. Free memory was 163.7 MB in the beginning and 148.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((a21 == 1 && a17 <= 0) || ((a21 == 1 && !(a7 == 1)) && a17 == 1)) || a8 <= 13 - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((a21 == 1 && a17 <= 0) || ((a21 == 1 && !(a7 == 1)) && a17 == 1)) || a8 <= 13 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.5s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 503 SDtfs, 961 SDslu, 53 SDs, 0 SdLazy, 2575 SolverSat, 587 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 467 GetRequests, 448 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1494occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 1633 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 45 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3000 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 100 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 1626 NumberOfCodeBlocks, 1626 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 1830 ConstructedInterpolants, 0 QuantifiedInterpolants, 945439 SizeOfPredicates, 1 NumberOfNonLiveVariables, 484 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 14 InterpolantComputations, 13 PerfectInterpolantSequences, 1440/1528 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...