./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label54.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_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label54.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/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 82dff1713e271abdc8f24172a0abd315632e3f42 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:05:04,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:05:04,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:05:04,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:05:04,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:05:04,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:05:04,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:05:04,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:05:04,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:05:04,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:05:04,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:05:04,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:05:04,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:05:04,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:05:04,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:05:04,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:05:04,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:05:04,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:05:04,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:05:04,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:05:04,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:05:04,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:05:04,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:05:04,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:05:04,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:05:04,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:05:04,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:05:04,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:05:04,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:05:04,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:05:04,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:05:04,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:05:04,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:05:04,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:05:04,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:05:04,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:05:04,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:05:04,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:05:04,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:05:04,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:05:04,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:05:04,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:05:04,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:05:04,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:05:04,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:05:04,944 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:05:04,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:05:04,945 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:05:04,945 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:05:04,946 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:05:04,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:05:04,946 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:05:04,947 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:05:04,947 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:05:04,948 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:05:04,948 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:05:04,948 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:05:04,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:05:04,950 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:05:04,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:05:04,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:05:04,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:05:04,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:05:04,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:05:04,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:05:04,952 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:05:04,952 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:05:04,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:05:04,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:05:04,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:05:04,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:05:04,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:05:04,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:05:04,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:04,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:05:04,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:05:04,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:05:04,955 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:05:04,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:05:04,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:05:04,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:05:04,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:05:04,956 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_fc25f916-2e59-4591-bca6-d13d67ae3de4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82dff1713e271abdc8f24172a0abd315632e3f42 [2020-11-22 13:05:05,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:05:05,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:05:05,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:05:05,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:05:05,207 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:05:05,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label54.c [2020-11-22 13:05:05,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/data/411b06cc8/50380603e68c4670ae28dd6f460f75bb/FLAG0711801f7 [2020-11-22 13:05:05,856 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:05:05,857 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/sv-benchmarks/c/eca-rers2012/Problem01_label54.c [2020-11-22 13:05:05,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/data/411b06cc8/50380603e68c4670ae28dd6f460f75bb/FLAG0711801f7 [2020-11-22 13:05:06,137 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/data/411b06cc8/50380603e68c4670ae28dd6f460f75bb [2020-11-22 13:05:06,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:05:06,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:05:06,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:06,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:05:06,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:05:06,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0cd5c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06, skipping insertion in model container [2020-11-22 13:05:06,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:05:06,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:05:06,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:06,711 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:05:06,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:06,843 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:05:06,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06 WrapperNode [2020-11-22 13:05:06,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:06,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:06,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:05:06,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:05:06,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:06,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:05:06,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:05:06,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:05:06,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:06,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... [2020-11-22 13:05:07,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:05:07,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:05:07,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:05:07,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:05:07,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:07,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:05:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:05:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:05:07,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:05:09,793 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:05:09,793 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-22 13:05:09,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:09 BoogieIcfgContainer [2020-11-22 13:05:09,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:05:09,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:05:09,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:05:09,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:05:09,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:05:06" (1/3) ... [2020-11-22 13:05:09,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1c9634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:09, skipping insertion in model container [2020-11-22 13:05:09,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:06" (2/3) ... [2020-11-22 13:05:09,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1c9634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:09, skipping insertion in model container [2020-11-22 13:05:09,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:09" (3/3) ... [2020-11-22 13:05:09,808 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label54.c [2020-11-22 13:05:09,819 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:05:09,823 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:05:09,835 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:05:09,872 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:05:09,872 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:05:09,872 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:05:09,872 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:05:09,872 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:05:09,873 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:05:09,873 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:05:09,873 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:05:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-22 13:05:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-22 13:05:09,899 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:09,900 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] [2020-11-22 13:05:09,900 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1520713069, now seen corresponding path program 1 times [2020-11-22 13:05:09,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:09,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756635087] [2020-11-22 13:05:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:10,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756635087] [2020-11-22 13:05:10,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:10,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:10,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763218995] [2020-11-22 13:05:10,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:10,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:10,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:10,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:10,274 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-22 13:05:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:10,978 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-22 13:05:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:10,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-22 13:05:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:11,000 INFO L225 Difference]: With dead ends: 224 [2020-11-22 13:05:11,000 INFO L226 Difference]: Without dead ends: 145 [2020-11-22 13:05:11,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-22 13:05:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-22 13:05:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-22 13:05:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 253 transitions. [2020-11-22 13:05:11,075 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 253 transitions. Word has length 71 [2020-11-22 13:05:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:11,076 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 253 transitions. [2020-11-22 13:05:11,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 253 transitions. [2020-11-22 13:05:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-22 13:05:11,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:11,086 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-11-22 13:05:11,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:05:11,086 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1531539289, now seen corresponding path program 1 times [2020-11-22 13:05:11,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:11,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567829203] [2020-11-22 13:05:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-22 13:05:11,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567829203] [2020-11-22 13:05:11,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:11,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:11,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690199876] [2020-11-22 13:05:11,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:11,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:11,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:11,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:11,276 INFO L87 Difference]: Start difference. First operand 145 states and 253 transitions. Second operand 3 states. [2020-11-22 13:05:11,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:11,679 INFO L93 Difference]: Finished difference Result 431 states and 756 transitions. [2020-11-22 13:05:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:11,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-11-22 13:05:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:11,683 INFO L225 Difference]: With dead ends: 431 [2020-11-22 13:05:11,684 INFO L226 Difference]: Without dead ends: 287 [2020-11-22 13:05:11,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-22 13:05:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-22 13:05:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-22 13:05:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2020-11-22 13:05:11,711 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 75 [2020-11-22 13:05:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:11,712 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2020-11-22 13:05:11,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2020-11-22 13:05:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-22 13:05:11,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:11,717 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, 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] [2020-11-22 13:05:11,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:05:11,717 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:11,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:11,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2064958683, now seen corresponding path program 1 times [2020-11-22 13:05:11,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:11,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747363545] [2020-11-22 13:05:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747363545] [2020-11-22 13:05:11,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:11,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:11,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164270845] [2020-11-22 13:05:11,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:11,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:11,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:11,828 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand 4 states. [2020-11-22 13:05:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:12,421 INFO L93 Difference]: Finished difference Result 715 states and 1141 transitions. [2020-11-22 13:05:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:12,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-11-22 13:05:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:12,425 INFO L225 Difference]: With dead ends: 715 [2020-11-22 13:05:12,425 INFO L226 Difference]: Without dead ends: 429 [2020-11-22 13:05:12,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-22 13:05:12,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-11-22 13:05:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-11-22 13:05:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 639 transitions. [2020-11-22 13:05:12,474 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 639 transitions. Word has length 105 [2020-11-22 13:05:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:12,474 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 639 transitions. [2020-11-22 13:05:12,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 639 transitions. [2020-11-22 13:05:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-22 13:05:12,479 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:12,479 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, 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] [2020-11-22 13:05:12,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:05:12,480 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:12,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:12,480 INFO L82 PathProgramCache]: Analyzing trace with hash -480428507, now seen corresponding path program 1 times [2020-11-22 13:05:12,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:12,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779511674] [2020-11-22 13:05:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-22 13:05:12,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779511674] [2020-11-22 13:05:12,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:12,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:12,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811549055] [2020-11-22 13:05:12,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:12,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:12,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:12,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:12,617 INFO L87 Difference]: Start difference. First operand 429 states and 639 transitions. Second operand 3 states. [2020-11-22 13:05:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:12,971 INFO L93 Difference]: Finished difference Result 999 states and 1479 transitions. [2020-11-22 13:05:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:12,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-11-22 13:05:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:12,975 INFO L225 Difference]: With dead ends: 999 [2020-11-22 13:05:12,975 INFO L226 Difference]: Without dead ends: 571 [2020-11-22 13:05:12,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-22 13:05:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 429. [2020-11-22 13:05:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-11-22 13:05:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 627 transitions. [2020-11-22 13:05:13,002 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 627 transitions. Word has length 109 [2020-11-22 13:05:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:13,002 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 627 transitions. [2020-11-22 13:05:13,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 627 transitions. [2020-11-22 13:05:13,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-11-22 13:05:13,008 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:13,009 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, 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] [2020-11-22 13:05:13,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:05:13,010 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash -363768353, now seen corresponding path program 1 times [2020-11-22 13:05:13,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:13,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110947824] [2020-11-22 13:05:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-22 13:05:13,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110947824] [2020-11-22 13:05:13,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:13,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:13,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116404059] [2020-11-22 13:05:13,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:13,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:13,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:13,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:13,121 INFO L87 Difference]: Start difference. First operand 429 states and 627 transitions. Second operand 4 states. [2020-11-22 13:05:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:13,677 INFO L93 Difference]: Finished difference Result 1354 states and 1955 transitions. [2020-11-22 13:05:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:13,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-11-22 13:05:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:13,682 INFO L225 Difference]: With dead ends: 1354 [2020-11-22 13:05:13,682 INFO L226 Difference]: Without dead ends: 784 [2020-11-22 13:05:13,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-22 13:05:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2020-11-22 13:05:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-22 13:05:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 998 transitions. [2020-11-22 13:05:13,721 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 998 transitions. Word has length 113 [2020-11-22 13:05:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:13,721 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 998 transitions. [2020-11-22 13:05:13,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 998 transitions. [2020-11-22 13:05:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-11-22 13:05:13,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:13,725 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, 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] [2020-11-22 13:05:13,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:05:13,726 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash -338581899, now seen corresponding path program 1 times [2020-11-22 13:05:13,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:13,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426118726] [2020-11-22 13:05:13,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-22 13:05:13,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426118726] [2020-11-22 13:05:13,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:13,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:13,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811326049] [2020-11-22 13:05:13,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:13,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:13,855 INFO L87 Difference]: Start difference. First operand 784 states and 998 transitions. Second operand 3 states. [2020-11-22 13:05:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:14,184 INFO L93 Difference]: Finished difference Result 1851 states and 2333 transitions. [2020-11-22 13:05:14,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:14,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-11-22 13:05:14,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:14,193 INFO L225 Difference]: With dead ends: 1851 [2020-11-22 13:05:14,193 INFO L226 Difference]: Without dead ends: 1068 [2020-11-22 13:05:14,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-11-22 13:05:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2020-11-22 13:05:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-22 13:05:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1175 transitions. [2020-11-22 13:05:14,227 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1175 transitions. Word has length 122 [2020-11-22 13:05:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:14,227 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1175 transitions. [2020-11-22 13:05:14,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1175 transitions. [2020-11-22 13:05:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-22 13:05:14,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:14,237 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, 3, 3, 3, 3, 3, 3, 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] [2020-11-22 13:05:14,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:05:14,237 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:14,237 INFO L82 PathProgramCache]: Analyzing trace with hash -618939587, now seen corresponding path program 1 times [2020-11-22 13:05:14,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:14,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598589116] [2020-11-22 13:05:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-22 13:05:14,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598589116] [2020-11-22 13:05:14,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:14,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:14,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204389643] [2020-11-22 13:05:14,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:14,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:14,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:14,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:14,393 INFO L87 Difference]: Start difference. First operand 926 states and 1175 transitions. Second operand 3 states. [2020-11-22 13:05:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:14,700 INFO L93 Difference]: Finished difference Result 1851 states and 2349 transitions. [2020-11-22 13:05:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:14,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-11-22 13:05:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:14,705 INFO L225 Difference]: With dead ends: 1851 [2020-11-22 13:05:14,706 INFO L226 Difference]: Without dead ends: 926 [2020-11-22 13:05:14,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-22 13:05:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 926. [2020-11-22 13:05:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-22 13:05:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1161 transitions. [2020-11-22 13:05:14,733 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1161 transitions. Word has length 138 [2020-11-22 13:05:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:14,735 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1161 transitions. [2020-11-22 13:05:14,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1161 transitions. [2020-11-22 13:05:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-22 13:05:14,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:14,738 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, 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] [2020-11-22 13:05:14,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:05:14,738 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:14,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2031263963, now seen corresponding path program 1 times [2020-11-22 13:05:14,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:14,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107803172] [2020-11-22 13:05:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-11-22 13:05:14,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107803172] [2020-11-22 13:05:14,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:14,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:14,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060644102] [2020-11-22 13:05:14,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:14,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:14,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:14,865 INFO L87 Difference]: Start difference. First operand 926 states and 1161 transitions. Second operand 4 states. [2020-11-22 13:05:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:15,284 INFO L93 Difference]: Finished difference Result 1922 states and 2403 transitions. [2020-11-22 13:05:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:15,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-11-22 13:05:15,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:15,291 INFO L225 Difference]: With dead ends: 1922 [2020-11-22 13:05:15,291 INFO L226 Difference]: Without dead ends: 997 [2020-11-22 13:05:15,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-22 13:05:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2020-11-22 13:05:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-22 13:05:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1230 transitions. [2020-11-22 13:05:15,322 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1230 transitions. Word has length 154 [2020-11-22 13:05:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:15,323 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1230 transitions. [2020-11-22 13:05:15,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1230 transitions. [2020-11-22 13:05:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-11-22 13:05:15,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:15,327 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:15,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:05:15,329 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:15,329 INFO L82 PathProgramCache]: Analyzing trace with hash -536182670, now seen corresponding path program 1 times [2020-11-22 13:05:15,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:15,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446861607] [2020-11-22 13:05:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-11-22 13:05:15,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446861607] [2020-11-22 13:05:15,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:15,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:15,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571422115] [2020-11-22 13:05:15,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:15,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:15,491 INFO L87 Difference]: Start difference. First operand 997 states and 1230 transitions. Second operand 3 states. [2020-11-22 13:05:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:15,822 INFO L93 Difference]: Finished difference Result 2277 states and 2824 transitions. [2020-11-22 13:05:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:15,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-11-22 13:05:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:15,833 INFO L225 Difference]: With dead ends: 2277 [2020-11-22 13:05:15,833 INFO L226 Difference]: Without dead ends: 1281 [2020-11-22 13:05:15,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-22 13:05:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1139. [2020-11-22 13:05:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-22 13:05:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1415 transitions. [2020-11-22 13:05:15,868 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1415 transitions. Word has length 171 [2020-11-22 13:05:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:15,868 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1415 transitions. [2020-11-22 13:05:15,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1415 transitions. [2020-11-22 13:05:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-22 13:05:15,875 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:15,875 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:15,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:05:15,876 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash 223932725, now seen corresponding path program 1 times [2020-11-22 13:05:15,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:15,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150877492] [2020-11-22 13:05:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:16,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150877492] [2020-11-22 13:05:16,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788356736] [2020-11-22 13:05:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 13:05:16,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-22 13:05:16,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-22 13:05:16,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:05:16,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-22 13:05:16,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192947222] [2020-11-22 13:05:16,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:16,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:05:16,811 INFO L87 Difference]: Start difference. First operand 1139 states and 1415 transitions. Second operand 3 states. [2020-11-22 13:05:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:17,167 INFO L93 Difference]: Finished difference Result 2277 states and 2829 transitions. [2020-11-22 13:05:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:17,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2020-11-22 13:05:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:17,174 INFO L225 Difference]: With dead ends: 2277 [2020-11-22 13:05:17,174 INFO L226 Difference]: Without dead ends: 1139 [2020-11-22 13:05:17,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:05:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-22 13:05:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 997. [2020-11-22 13:05:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-22 13:05:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1184 transitions. [2020-11-22 13:05:17,209 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1184 transitions. Word has length 175 [2020-11-22 13:05:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:17,209 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1184 transitions. [2020-11-22 13:05:17,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1184 transitions. [2020-11-22 13:05:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-11-22 13:05:17,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:17,213 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-22 13:05:17,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-22 13:05:17,426 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash 677814523, now seen corresponding path program 1 times [2020-11-22 13:05:17,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:17,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367166068] [2020-11-22 13:05:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-11-22 13:05:17,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367166068] [2020-11-22 13:05:17,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:17,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:05:17,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259848638] [2020-11-22 13:05:17,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:17,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:17,600 INFO L87 Difference]: Start difference. First operand 997 states and 1184 transitions. Second operand 4 states. [2020-11-22 13:05:18,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:18,030 INFO L93 Difference]: Finished difference Result 2238 states and 2639 transitions. [2020-11-22 13:05:18,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:18,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 220 [2020-11-22 13:05:18,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:18,038 INFO L225 Difference]: With dead ends: 2238 [2020-11-22 13:05:18,038 INFO L226 Difference]: Without dead ends: 1242 [2020-11-22 13:05:18,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-11-22 13:05:18,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1139. [2020-11-22 13:05:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-22 13:05:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1334 transitions. [2020-11-22 13:05:18,079 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1334 transitions. Word has length 220 [2020-11-22 13:05:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:18,080 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1334 transitions. [2020-11-22 13:05:18,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:18,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1334 transitions. [2020-11-22 13:05:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-11-22 13:05:18,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:18,085 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-11-22 13:05:18,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:05:18,085 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:18,086 INFO L82 PathProgramCache]: Analyzing trace with hash 733156002, now seen corresponding path program 1 times [2020-11-22 13:05:18,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:18,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115027752] [2020-11-22 13:05:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-11-22 13:05:18,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115027752] [2020-11-22 13:05:18,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:18,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:18,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627859790] [2020-11-22 13:05:18,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:18,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:18,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:18,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:18,218 INFO L87 Difference]: Start difference. First operand 1139 states and 1334 transitions. Second operand 3 states. [2020-11-22 13:05:18,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:18,556 INFO L93 Difference]: Finished difference Result 2277 states and 2667 transitions. [2020-11-22 13:05:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:18,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-11-22 13:05:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:18,565 INFO L225 Difference]: With dead ends: 2277 [2020-11-22 13:05:18,565 INFO L226 Difference]: Without dead ends: 1139 [2020-11-22 13:05:18,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-22 13:05:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-11-22 13:05:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-22 13:05:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1303 transitions. [2020-11-22 13:05:18,600 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1303 transitions. Word has length 233 [2020-11-22 13:05:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:18,600 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1303 transitions. [2020-11-22 13:05:18,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1303 transitions. [2020-11-22 13:05:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-11-22 13:05:18,605 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:18,608 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-11-22 13:05:18,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-22 13:05:18,608 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:18,609 INFO L82 PathProgramCache]: Analyzing trace with hash -995890108, now seen corresponding path program 1 times [2020-11-22 13:05:18,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:18,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374935299] [2020-11-22 13:05:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-11-22 13:05:18,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374935299] [2020-11-22 13:05:18,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:18,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:18,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790800042] [2020-11-22 13:05:18,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:18,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:18,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:18,811 INFO L87 Difference]: Start difference. First operand 1139 states and 1303 transitions. Second operand 3 states. [2020-11-22 13:05:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:19,270 INFO L93 Difference]: Finished difference Result 2488 states and 2834 transitions. [2020-11-22 13:05:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:19,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2020-11-22 13:05:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:19,272 INFO L225 Difference]: With dead ends: 2488 [2020-11-22 13:05:19,272 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:05:19,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:05:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:05:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:05:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:05:19,276 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 242 [2020-11-22 13:05:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:19,276 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:05:19,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:05:19,276 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:05:19,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-22 13:05:19,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:05:19,735 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-11-22 13:05:20,075 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2020-11-22 13:05:20,079 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-22 13:05:20,079 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-22 13:05:20,079 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-22 13:05:20,079 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-22 13:05:20,079 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-22 13:05:20,079 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-22 13:05:20,079 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-22 13:05:20,080 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point L548-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 13:05:20,081 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:05:20,082 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-22 13:05:20,082 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-22 13:05:20,082 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-22 13:05:20,082 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse7 (= ~a16~0 6)) (.cse1 (not (= ~a7~0 1))) (.cse5 (= ~a21~0 1)) (.cse10 (<= ~a16~0 4)) (.cse4 (= ~a17~0 1)) (.cse9 (<= ~a8~0 13)) (.cse3 (<= 15 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse8 (<= ~a17~0 0)) (.cse2 (not .cse6))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse6 .cse1 .cse4) (and .cse7 .cse8 .cse6 .cse9) (and .cse7 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse8 .cse6) (and .cse10 .cse8 .cse9) (and .cse5 .cse10 .cse6 .cse4) (and .cse0 .cse4 .cse9) (and .cse8 .cse2 .cse3) (and .cse0 .cse8 .cse2)))) [2020-11-22 13:05:20,082 INFO L274 CegarLoopResult]: For program point L551-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 13:05:20,082 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-22 13:05:20,082 INFO L274 CegarLoopResult]: For program point L552(line 552) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-22 13:05:20,083 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse7 (= ~a16~0 6)) (.cse1 (not (= ~a7~0 1))) (.cse5 (= ~a21~0 1)) (.cse10 (<= ~a16~0 4)) (.cse4 (= ~a17~0 1)) (.cse9 (<= ~a8~0 13)) (.cse3 (<= 15 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse8 (<= ~a17~0 0)) (.cse2 (not .cse6))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse6 .cse1 .cse4) (and .cse7 .cse8 .cse6 .cse9) (and .cse7 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse8 .cse6) (and .cse10 .cse8 .cse9) (and .cse5 .cse10 .cse6 .cse4) (and .cse0 .cse4 .cse9) (and .cse8 .cse2 .cse3) (and .cse0 .cse8 .cse2)))) [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-22 13:05:20,084 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 13:05:20,085 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-22 13:05:20,085 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-22 13:05:20,085 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-22 13:05:20,085 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-22 13:05:20,085 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-22 13:05:20,085 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-22 13:05:20,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:05:20 BoogieIcfgContainer [2020-11-22 13:05:20,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:05:20,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:05:20,134 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:05:20,135 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:05:20,135 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:09" (3/4) ... [2020-11-22 13:05:20,138 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:05:20,169 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-22 13:05:20,170 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-22 13:05:20,172 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-22 13:05:20,173 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 13:05:20,322 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fc25f916-2e59-4591-bca6-d13d67ae3de4/bin/utaipan/witness.graphml [2020-11-22 13:05:20,323 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:05:20,323 INFO L168 Benchmark]: Toolchain (without parser) took 14181.98 ms. Allocated memory was 86.0 MB in the beginning and 360.7 MB in the end (delta: 274.7 MB). Free memory was 50.9 MB in the beginning and 138.3 MB in the end (delta: -87.3 MB). Peak memory consumption was 187.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:20,324 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory is still 45.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:20,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 698.24 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 50.8 MB in the beginning and 63.9 MB in the end (delta: -13.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:20,325 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.34 ms. Allocated memory is still 104.9 MB. Free memory was 63.9 MB in the beginning and 58.2 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:20,325 INFO L168 Benchmark]: Boogie Preprocessor took 63.03 ms. Allocated memory is still 104.9 MB. Free memory was 58.2 MB in the beginning and 54.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:20,325 INFO L168 Benchmark]: RCFGBuilder took 2789.30 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 54.0 MB in the beginning and 107.0 MB in the end (delta: -53.0 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:20,326 INFO L168 Benchmark]: TraceAbstraction took 10334.15 ms. Allocated memory was 140.5 MB in the beginning and 360.7 MB in the end (delta: 220.2 MB). Free memory was 106.0 MB in the beginning and 154.0 MB in the end (delta: -48.0 MB). Peak memory consumption was 171.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:20,326 INFO L168 Benchmark]: Witness Printer took 188.44 ms. Allocated memory is still 360.7 MB. Free memory was 154.0 MB in the beginning and 138.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:20,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory is still 45.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 698.24 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 50.8 MB in the beginning and 63.9 MB in the end (delta: -13.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 99.34 ms. Allocated memory is still 104.9 MB. Free memory was 63.9 MB in the beginning and 58.2 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.03 ms. Allocated memory is still 104.9 MB. Free memory was 58.2 MB in the beginning and 54.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2789.30 ms. Allocated memory was 104.9 MB in the beginning and 140.5 MB in the end (delta: 35.7 MB). Free memory was 54.0 MB in the beginning and 107.0 MB in the end (delta: -53.0 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10334.15 ms. Allocated memory was 140.5 MB in the beginning and 360.7 MB in the end (delta: 220.2 MB). Free memory was 106.0 MB in the beginning and 154.0 MB in the end (delta: -48.0 MB). Peak memory consumption was 171.1 MB. Max. memory is 16.1 GB. * Witness Printer took 188.44 ms. Allocated memory is still 360.7 MB. Free memory was 154.0 MB in the beginning and 138.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 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: ((((((((((((a16 <= 5 && !(a7 == 1)) && !(a20 == 1)) && 15 <= a8) && a17 == 1) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (((a16 == 6 && a17 <= 0) && a20 == 1) && a8 <= 13)) || ((((a16 == 6 && !(a7 == 1)) && !(a20 == 1)) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a17 <= 0) && a20 == 1)) || ((a16 <= 4 && a17 <= 0) && a8 <= 13)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || ((a17 <= 0 && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 5 && a17 <= 0) && !(a20 == 1)) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((((a16 <= 5 && !(a7 == 1)) && !(a20 == 1)) && 15 <= a8) && a17 == 1) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (((a16 == 6 && a17 <= 0) && a20 == 1) && a8 <= 13)) || ((((a16 == 6 && !(a7 == 1)) && !(a20 == 1)) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a17 <= 0) && a20 == 1)) || ((a16 <= 4 && a17 <= 0) && a8 <= 13)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || ((a17 <= 0 && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 5 && a17 <= 0) && !(a20 == 1)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.4s, OverallIterations: 13, TraceHistogramMax: 7, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 692 SDtfs, 914 SDslu, 59 SDs, 0 SdLazy, 3006 SolverSat, 748 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 386 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1139occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 13 MinimizatonAttempts, 671 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 259 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2723 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 479 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 2103 NumberOfCodeBlocks, 2103 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2263 ConstructedInterpolants, 0 QuantifiedInterpolants, 1352615 SizeOfPredicates, 1 NumberOfNonLiveVariables, 397 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 15 InterpolantComputations, 14 PerfectInterpolantSequences, 2117/2209 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...