./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label04.c -s /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/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 a782d0524cc0b0b5c0b646ffcbe2ffba4b8b0177 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:41:44,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:41:44,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:41:44,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:41:44,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:41:44,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:41:44,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:41:44,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:41:44,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:41:44,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:41:44,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:41:44,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:41:44,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:41:44,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:41:44,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:41:44,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:41:44,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:41:44,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:41:44,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:41:44,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:41:44,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:41:44,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:41:44,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:41:44,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:41:44,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:41:44,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:41:44,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:41:44,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:41:44,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:41:44,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:41:44,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:41:44,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:41:44,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:41:44,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:41:44,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:41:44,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:41:44,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:41:44,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:41:44,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:41:44,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:41:44,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:41:44,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 20:41:44,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:41:44,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:41:44,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:41:44,960 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:41:44,960 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:41:44,960 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:41:44,960 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:41:44,961 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:41:44,961 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:41:44,961 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:41:44,961 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:41:44,961 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:41:44,961 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:41:44,961 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:41:44,961 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:41:44,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:41:44,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:41:44,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:41:44,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:41:44,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:41:44,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:41:44,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:41:44,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:41:44,963 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:41:44,963 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:41:44,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:41:44,963 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:41:44,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:41:44,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:41:44,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:41:44,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:41:44,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:41:44,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:41:44,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:41:44,964 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:41:44,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:41:44,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:41:44,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:41:44,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:41:44,965 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_935c0853-7dc0-45be-9954-eeb8884223c2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a782d0524cc0b0b5c0b646ffcbe2ffba4b8b0177 [2020-12-09 20:41:45,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:41:45,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:41:45,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:41:45,158 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:41:45,159 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:41:45,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label04.c [2020-12-09 20:41:45,210 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/data/0b5cd0793/d6e7be4aa2b148adb299cbccad714532/FLAG81680b1b2 [2020-12-09 20:41:45,648 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:41:45,648 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/sv-benchmarks/c/eca-rers2012/Problem01_label04.c [2020-12-09 20:41:45,659 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/data/0b5cd0793/d6e7be4aa2b148adb299cbccad714532/FLAG81680b1b2 [2020-12-09 20:41:45,680 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/data/0b5cd0793/d6e7be4aa2b148adb299cbccad714532 [2020-12-09 20:41:45,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:41:45,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:41:45,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:41:45,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:41:45,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:41:45,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:41:45" (1/1) ... [2020-12-09 20:41:45,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131c38e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:45, skipping insertion in model container [2020-12-09 20:41:45,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:41:45" (1/1) ... [2020-12-09 20:41:45,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:41:45,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:41:45,954 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/sv-benchmarks/c/eca-rers2012/Problem01_label04.c[17486,17499] [2020-12-09 20:41:45,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:41:45,985 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:41:46,039 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/sv-benchmarks/c/eca-rers2012/Problem01_label04.c[17486,17499] [2020-12-09 20:41:46,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:41:46,060 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:41:46,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46 WrapperNode [2020-12-09 20:41:46,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:41:46,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:41:46,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:41:46,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:41:46,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... [2020-12-09 20:41:46,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... [2020-12-09 20:41:46,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:41:46,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:41:46,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:41:46,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:41:46,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... [2020-12-09 20:41:46,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... [2020-12-09 20:41:46,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... [2020-12-09 20:41:46,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... [2020-12-09 20:41:46,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... [2020-12-09 20:41:46,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... [2020-12-09 20:41:46,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... [2020-12-09 20:41:46,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:41:46,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:41:46,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:41:46,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:41:46,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/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 [2020-12-09 20:41:46,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:41:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:41:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:41:46,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:41:47,391 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:41:47,391 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 20:41:47,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:41:47 BoogieIcfgContainer [2020-12-09 20:41:47,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:41:47,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:41:47,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:41:47,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:41:47,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:41:45" (1/3) ... [2020-12-09 20:41:47,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2081d7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:41:47, skipping insertion in model container [2020-12-09 20:41:47,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:46" (2/3) ... [2020-12-09 20:41:47,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2081d7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:41:47, skipping insertion in model container [2020-12-09 20:41:47,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:41:47" (3/3) ... [2020-12-09 20:41:47,399 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label04.c [2020-12-09 20:41:47,408 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:41:47,411 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 20:41:47,418 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 20:41:47,435 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:41:47,435 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:41:47,435 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:41:47,435 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:41:47,436 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:41:47,436 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:41:47,436 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:41:47,436 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:41:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-12-09 20:41:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-09 20:41:47,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:47,452 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] [2020-12-09 20:41:47,452 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1806913112, now seen corresponding path program 1 times [2020-12-09 20:41:47,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:47,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044826774] [2020-12-09 20:41:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:47,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044826774] [2020-12-09 20:41:47,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:47,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:41:47,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214862435] [2020-12-09 20:41:47,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:47,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:47,721 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-12-09 20:41:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:48,018 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-12-09 20:41:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:48,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-09 20:41:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:48,028 INFO L225 Difference]: With dead ends: 224 [2020-12-09 20:41:48,028 INFO L226 Difference]: Without dead ends: 145 [2020-12-09 20:41:48,030 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 [2020-12-09 20:41:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-09 20:41:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-09 20:41:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-09 20:41:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-12-09 20:41:48,064 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-12-09 20:41:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:48,065 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-12-09 20:41:48,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-12-09 20:41:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-09 20:41:48,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:48,068 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:48,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:41:48,068 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:48,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:48,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1034857605, now seen corresponding path program 1 times [2020-12-09 20:41:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:48,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313721515] [2020-12-09 20:41:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:48,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313721515] [2020-12-09 20:41:48,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:48,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:41:48,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946860483] [2020-12-09 20:41:48,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:48,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:48,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:48,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:48,111 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-12-09 20:41:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:48,349 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-12-09 20:41:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:48,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-09 20:41:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:48,352 INFO L225 Difference]: With dead ends: 431 [2020-12-09 20:41:48,352 INFO L226 Difference]: Without dead ends: 287 [2020-12-09 20:41:48,353 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 [2020-12-09 20:41:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-09 20:41:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-12-09 20:41:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 20:41:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-12-09 20:41:48,370 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-12-09 20:41:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:48,370 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-12-09 20:41:48,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-12-09 20:41:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-09 20:41:48,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:48,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:48,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:41:48,372 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:48,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:48,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1703778247, now seen corresponding path program 1 times [2020-12-09 20:41:48,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:48,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62204333] [2020-12-09 20:41:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 20:41:48,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62204333] [2020-12-09 20:41:48,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:48,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:41:48,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462966303] [2020-12-09 20:41:48,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:48,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:48,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:48,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:48,449 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 3 states. [2020-12-09 20:41:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:48,671 INFO L93 Difference]: Finished difference Result 857 states and 1401 transitions. [2020-12-09 20:41:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:48,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-09 20:41:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:48,675 INFO L225 Difference]: With dead ends: 857 [2020-12-09 20:41:48,675 INFO L226 Difference]: Without dead ends: 571 [2020-12-09 20:41:48,677 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 [2020-12-09 20:41:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-09 20:41:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-12-09 20:41:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-09 20:41:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 884 transitions. [2020-12-09 20:41:48,707 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 884 transitions. Word has length 78 [2020-12-09 20:41:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:48,708 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 884 transitions. [2020-12-09 20:41:48,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 884 transitions. [2020-12-09 20:41:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-09 20:41:48,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:48,713 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:48,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:41:48,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:48,714 INFO L82 PathProgramCache]: Analyzing trace with hash 289049227, now seen corresponding path program 1 times [2020-12-09 20:41:48,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:48,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608147624] [2020-12-09 20:41:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 20:41:48,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608147624] [2020-12-09 20:41:48,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:48,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:41:48,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798013611] [2020-12-09 20:41:48,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:48,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:48,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:48,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:48,782 INFO L87 Difference]: Start difference. First operand 571 states and 884 transitions. Second operand 3 states. [2020-12-09 20:41:49,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:49,037 INFO L93 Difference]: Finished difference Result 1567 states and 2441 transitions. [2020-12-09 20:41:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:49,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-09 20:41:49,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:49,042 INFO L225 Difference]: With dead ends: 1567 [2020-12-09 20:41:49,042 INFO L226 Difference]: Without dead ends: 997 [2020-12-09 20:41:49,043 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 [2020-12-09 20:41:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-12-09 20:41:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 713. [2020-12-09 20:41:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-12-09 20:41:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1045 transitions. [2020-12-09 20:41:49,064 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1045 transitions. Word has length 91 [2020-12-09 20:41:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:49,064 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1045 transitions. [2020-12-09 20:41:49,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1045 transitions. [2020-12-09 20:41:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-09 20:41:49,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:49,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:49,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:41:49,066 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:49,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:49,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1324171411, now seen corresponding path program 1 times [2020-12-09 20:41:49,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:49,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183027649] [2020-12-09 20:41:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:49,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183027649] [2020-12-09 20:41:49,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:49,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:41:49,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119397123] [2020-12-09 20:41:49,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:49,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:49,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:49,118 INFO L87 Difference]: Start difference. First operand 713 states and 1045 transitions. Second operand 3 states. [2020-12-09 20:41:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:49,412 INFO L93 Difference]: Finished difference Result 2135 states and 3132 transitions. [2020-12-09 20:41:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:49,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-09 20:41:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:49,421 INFO L225 Difference]: With dead ends: 2135 [2020-12-09 20:41:49,421 INFO L226 Difference]: Without dead ends: 1423 [2020-12-09 20:41:49,422 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 [2020-12-09 20:41:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-12-09 20:41:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1210. [2020-12-09 20:41:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-09 20:41:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1704 transitions. [2020-12-09 20:41:49,456 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1704 transitions. Word has length 94 [2020-12-09 20:41:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:49,456 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1704 transitions. [2020-12-09 20:41:49,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1704 transitions. [2020-12-09 20:41:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-09 20:41:49,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:49,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:49,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 20:41:49,460 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:49,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1729122794, now seen corresponding path program 1 times [2020-12-09 20:41:49,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:49,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901026614] [2020-12-09 20:41:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:49,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901026614] [2020-12-09 20:41:49,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:49,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:41:49,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052205603] [2020-12-09 20:41:49,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:41:49,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:49,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:41:49,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:41:49,520 INFO L87 Difference]: Start difference. First operand 1210 states and 1704 transitions. Second operand 4 states. [2020-12-09 20:41:49,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:49,877 INFO L93 Difference]: Finished difference Result 2632 states and 3644 transitions. [2020-12-09 20:41:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:41:49,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-12-09 20:41:49,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:49,883 INFO L225 Difference]: With dead ends: 2632 [2020-12-09 20:41:49,883 INFO L226 Difference]: Without dead ends: 1494 [2020-12-09 20:41:49,884 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 [2020-12-09 20:41:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-12-09 20:41:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1281. [2020-12-09 20:41:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-09 20:41:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1769 transitions. [2020-12-09 20:41:49,904 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1769 transitions. Word has length 97 [2020-12-09 20:41:49,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:49,904 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1769 transitions. [2020-12-09 20:41:49,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:41:49,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1769 transitions. [2020-12-09 20:41:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-09 20:41:49,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:49,906 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:49,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 20:41:49,906 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:49,907 INFO L82 PathProgramCache]: Analyzing trace with hash -720011127, now seen corresponding path program 1 times [2020-12-09 20:41:49,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:49,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377593527] [2020-12-09 20:41:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-09 20:41:49,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377593527] [2020-12-09 20:41:49,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:49,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:41:49,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787336154] [2020-12-09 20:41:49,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:49,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:49,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:49,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:49,944 INFO L87 Difference]: Start difference. First operand 1281 states and 1769 transitions. Second operand 3 states. [2020-12-09 20:41:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:50,178 INFO L93 Difference]: Finished difference Result 2632 states and 3608 transitions. [2020-12-09 20:41:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:50,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-12-09 20:41:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:50,183 INFO L225 Difference]: With dead ends: 2632 [2020-12-09 20:41:50,183 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 20:41:50,184 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 [2020-12-09 20:41:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 20:41:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-12-09 20:41:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-09 20:41:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1556 transitions. [2020-12-09 20:41:50,209 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1556 transitions. Word has length 98 [2020-12-09 20:41:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:50,209 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1556 transitions. [2020-12-09 20:41:50,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1556 transitions. [2020-12-09 20:41:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-09 20:41:50,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:50,211 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:50,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 20:41:50,212 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:50,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1815695407, now seen corresponding path program 1 times [2020-12-09 20:41:50,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:50,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524862561] [2020-12-09 20:41:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 20:41:50,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524862561] [2020-12-09 20:41:50,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:50,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:41:50,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432669827] [2020-12-09 20:41:50,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:50,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:50,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:50,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:50,259 INFO L87 Difference]: Start difference. First operand 1281 states and 1556 transitions. Second operand 3 states. [2020-12-09 20:41:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:50,440 INFO L93 Difference]: Finished difference Result 2490 states and 3033 transitions. [2020-12-09 20:41:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:50,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2020-12-09 20:41:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:50,444 INFO L225 Difference]: With dead ends: 2490 [2020-12-09 20:41:50,445 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 20:41:50,446 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 [2020-12-09 20:41:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 20:41:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-12-09 20:41:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-09 20:41:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1513 transitions. [2020-12-09 20:41:50,464 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1513 transitions. Word has length 102 [2020-12-09 20:41:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:50,464 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1513 transitions. [2020-12-09 20:41:50,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1513 transitions. [2020-12-09 20:41:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-09 20:41:50,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:50,466 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:50,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 20:41:50,466 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash -785768395, now seen corresponding path program 1 times [2020-12-09 20:41:50,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:50,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617230726] [2020-12-09 20:41:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-09 20:41:50,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617230726] [2020-12-09 20:41:50,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:50,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:41:50,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612296248] [2020-12-09 20:41:50,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:50,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:50,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:50,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:50,502 INFO L87 Difference]: Start difference. First operand 1281 states and 1513 transitions. Second operand 3 states. [2020-12-09 20:41:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:50,720 INFO L93 Difference]: Finished difference Result 2916 states and 3483 transitions. [2020-12-09 20:41:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:50,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-09 20:41:50,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:50,726 INFO L225 Difference]: With dead ends: 2916 [2020-12-09 20:41:50,727 INFO L226 Difference]: Without dead ends: 1707 [2020-12-09 20:41:50,728 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 [2020-12-09 20:41:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-12-09 20:41:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1636. [2020-12-09 20:41:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-12-09 20:41:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1964 transitions. [2020-12-09 20:41:50,763 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1964 transitions. Word has length 111 [2020-12-09 20:41:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:50,763 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1964 transitions. [2020-12-09 20:41:50,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1964 transitions. [2020-12-09 20:41:50,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-09 20:41:50,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:50,766 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:50,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 20:41:50,766 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:50,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:50,766 INFO L82 PathProgramCache]: Analyzing trace with hash 32930574, now seen corresponding path program 1 times [2020-12-09 20:41:50,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:50,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754051159] [2020-12-09 20:41:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 20:41:50,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754051159] [2020-12-09 20:41:50,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:50,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:41:50,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153413976] [2020-12-09 20:41:50,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:50,820 INFO L87 Difference]: Start difference. First operand 1636 states and 1964 transitions. Second operand 3 states. [2020-12-09 20:41:51,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:51,018 INFO L93 Difference]: Finished difference Result 3271 states and 3929 transitions. [2020-12-09 20:41:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:51,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-12-09 20:41:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:51,024 INFO L225 Difference]: With dead ends: 3271 [2020-12-09 20:41:51,025 INFO L226 Difference]: Without dead ends: 1707 [2020-12-09 20:41:51,026 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 [2020-12-09 20:41:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-12-09 20:41:51,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1636. [2020-12-09 20:41:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-12-09 20:41:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1954 transitions. [2020-12-09 20:41:51,048 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1954 transitions. Word has length 130 [2020-12-09 20:41:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:51,048 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1954 transitions. [2020-12-09 20:41:51,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1954 transitions. [2020-12-09 20:41:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-09 20:41:51,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:51,051 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 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] [2020-12-09 20:41:51,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 20:41:51,051 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1713658810, now seen corresponding path program 1 times [2020-12-09 20:41:51,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:51,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599811818] [2020-12-09 20:41:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-09 20:41:51,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599811818] [2020-12-09 20:41:51,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:51,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:41:51,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046187315] [2020-12-09 20:41:51,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:41:51,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:51,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:41:51,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:41:51,106 INFO L87 Difference]: Start difference. First operand 1636 states and 1954 transitions. Second operand 4 states. [2020-12-09 20:41:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:51,431 INFO L93 Difference]: Finished difference Result 3342 states and 3999 transitions. [2020-12-09 20:41:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:41:51,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-12-09 20:41:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:51,437 INFO L225 Difference]: With dead ends: 3342 [2020-12-09 20:41:51,437 INFO L226 Difference]: Without dead ends: 1778 [2020-12-09 20:41:51,438 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 [2020-12-09 20:41:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-12-09 20:41:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1636. [2020-12-09 20:41:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-12-09 20:41:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1934 transitions. [2020-12-09 20:41:51,461 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1934 transitions. Word has length 146 [2020-12-09 20:41:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:51,462 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1934 transitions. [2020-12-09 20:41:51,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:41:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1934 transitions. [2020-12-09 20:41:51,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-09 20:41:51,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:51,465 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-09 20:41:51,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 20:41:51,465 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:51,465 INFO L82 PathProgramCache]: Analyzing trace with hash -798086645, now seen corresponding path program 1 times [2020-12-09 20:41:51,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:51,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213479366] [2020-12-09 20:41:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 125 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-09 20:41:51,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213479366] [2020-12-09 20:41:51,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147829220] [2020-12-09 20:41:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/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 [2020-12-09 20:41:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:51,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 20:41:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:41:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-09 20:41:51,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:41:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-09 20:41:51,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 20:41:51,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-12-09 20:41:51,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586818396] [2020-12-09 20:41:51,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:41:51,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:51,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:41:51,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:41:51,916 INFO L87 Difference]: Start difference. First operand 1636 states and 1934 transitions. Second operand 4 states. [2020-12-09 20:41:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:52,219 INFO L93 Difference]: Finished difference Result 3626 states and 4331 transitions. [2020-12-09 20:41:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:41:52,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2020-12-09 20:41:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:52,226 INFO L225 Difference]: With dead ends: 3626 [2020-12-09 20:41:52,226 INFO L226 Difference]: Without dead ends: 2062 [2020-12-09 20:41:52,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:41:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2020-12-09 20:41:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1565. [2020-12-09 20:41:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2020-12-09 20:41:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1810 transitions. [2020-12-09 20:41:52,249 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1810 transitions. Word has length 163 [2020-12-09 20:41:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:52,249 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1810 transitions. [2020-12-09 20:41:52,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:41:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1810 transitions. [2020-12-09 20:41:52,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-09 20:41:52,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:52,253 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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, 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] [2020-12-09 20:41:52,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 20:41:52,453 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:52,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1852258601, now seen corresponding path program 1 times [2020-12-09 20:41:52,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:52,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838618689] [2020-12-09 20:41:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 158 proven. 11 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-12-09 20:41:52,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838618689] [2020-12-09 20:41:52,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431811251] [2020-12-09 20:41:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:41:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 20:41:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:41:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:41:52,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:41:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 20:41:52,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 20:41:52,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-12-09 20:41:52,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472767010] [2020-12-09 20:41:52,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:52,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:52,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:41:52,924 INFO L87 Difference]: Start difference. First operand 1565 states and 1810 transitions. Second operand 3 states. [2020-12-09 20:41:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:53,117 INFO L93 Difference]: Finished difference Result 1780 states and 2069 transitions. [2020-12-09 20:41:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:53,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2020-12-09 20:41:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:53,123 INFO L225 Difference]: With dead ends: 1780 [2020-12-09 20:41:53,123 INFO L226 Difference]: Without dead ends: 1778 [2020-12-09 20:41:53,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:41:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-12-09 20:41:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1707. [2020-12-09 20:41:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-12-09 20:41:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 1987 transitions. [2020-12-09 20:41:53,147 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 1987 transitions. Word has length 196 [2020-12-09 20:41:53,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:53,147 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 1987 transitions. [2020-12-09 20:41:53,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 1987 transitions. [2020-12-09 20:41:53,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-09 20:41:53,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:53,151 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 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] [2020-12-09 20:41:53,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-09 20:41:53,352 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:41:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1404089786, now seen corresponding path program 1 times [2020-12-09 20:41:53,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:53,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045508789] [2020-12-09 20:41:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 189 proven. 11 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-09 20:41:53,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045508789] [2020-12-09 20:41:53,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110993038] [2020-12-09 20:41:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:41:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:41:53,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:41:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-12-09 20:41:53,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:41:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-12-09 20:41:53,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 20:41:53,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-12-09 20:41:53,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655364412] [2020-12-09 20:41:53,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:41:53,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:53,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:41:53,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:41:53,833 INFO L87 Difference]: Start difference. First operand 1707 states and 1987 transitions. Second operand 4 states. [2020-12-09 20:41:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:54,138 INFO L93 Difference]: Finished difference Result 3340 states and 3886 transitions. [2020-12-09 20:41:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:41:54,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2020-12-09 20:41:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:54,139 INFO L225 Difference]: With dead ends: 3340 [2020-12-09 20:41:54,139 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 20:41:54,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:41:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 20:41:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 20:41:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 20:41:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 20:41:54,142 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 221 [2020-12-09 20:41:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:54,142 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 20:41:54,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:41:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 20:41:54,142 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 20:41:54,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-09 20:41:54,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 20:41:54,482 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 50 [2020-12-09 20:41:54,667 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-09 20:41:54,792 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-09 20:41:54,794 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L470-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-12-09 20:41:54,795 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L473-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L474(line 474) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-12-09 20:41:54,796 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-12-09 20:41:54,797 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-12-09 20:41:54,798 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse2 (<= ~a8~0 13)) (.cse0 (<= ~a16~0 4)) (.cse7 (= ~a20~0 1)) (.cse11 (= ~a17~0 1))) (let ((.cse5 (<= 15 ~a8~0)) (.cse4 (= ~a21~0 1)) (.cse6 (let ((.cse12 (<= ~a7~0 0))) (or (and .cse12 .cse2) (and .cse0 .cse12 .cse7 .cse11)))) (.cse1 (<= ~a21~0 0)) (.cse9 (< 13 ~a8~0)) (.cse10 (<= ~a16~0 5)) (.cse3 (not .cse11)) (.cse8 (not .cse7))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse2) (and .cse4 .cse5) (and .cse4 .cse6 .cse7) (and .cse3 .cse8 .cse5) (and .cse0 .cse7 .cse2) (and .cse4 .cse9 .cse10 .cse7) (and .cse10 .cse3 .cse6 .cse8) (and .cse1 .cse7 .cse2) (and .cse9 .cse10 .cse3 .cse8)))) [2020-12-09 20:41:54,798 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-12-09 20:41:54,798 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-12-09 20:41:54,798 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-12-09 20:41:54,798 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-12-09 20:41:54,798 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-12-09 20:41:54,798 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-12-09 20:41:54,798 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-12-09 20:41:54,799 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-12-09 20:41:54,800 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse2 (<= ~a8~0 13)) (.cse0 (<= ~a16~0 4)) (.cse7 (= ~a20~0 1)) (.cse11 (= ~a17~0 1))) (let ((.cse5 (<= 15 ~a8~0)) (.cse4 (= ~a21~0 1)) (.cse6 (let ((.cse12 (<= ~a7~0 0))) (or (and .cse12 .cse2) (and .cse0 .cse12 .cse7 .cse11)))) (.cse1 (<= ~a21~0 0)) (.cse9 (< 13 ~a8~0)) (.cse10 (<= ~a16~0 5)) (.cse3 (not .cse11)) (.cse8 (not .cse7))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse2) (and .cse4 .cse5) (and .cse4 .cse6 .cse7) (and .cse3 .cse8 .cse5) (and .cse0 .cse7 .cse2) (and .cse4 .cse9 .cse10 .cse7) (and .cse10 .cse3 .cse6 .cse8) (and .cse1 .cse7 .cse2) (and .cse9 .cse10 .cse3 .cse8)))) [2020-12-09 20:41:54,800 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-12-09 20:41:54,800 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 474) no Hoare annotation was computed. [2020-12-09 20:41:54,800 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-12-09 20:41:54,800 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-12-09 20:41:54,800 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-12-09 20:41:54,800 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-12-09 20:41:54,800 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-12-09 20:41:54,800 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-12-09 20:41:54,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:41:54 BoogieIcfgContainer [2020-12-09 20:41:54,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:41:54,822 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:41:54,822 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:41:54,823 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:41:54,823 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:41:47" (3/4) ... [2020-12-09 20:41:54,826 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 20:41:54,846 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-12-09 20:41:54,848 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-12-09 20:41:54,849 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 20:41:54,851 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 20:41:54,952 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_935c0853-7dc0-45be-9954-eeb8884223c2/bin/utaipan/witness.graphml [2020-12-09 20:41:54,952 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:41:54,953 INFO L168 Benchmark]: Toolchain (without parser) took 9269.39 ms. Allocated memory was 88.1 MB in the beginning and 285.2 MB in the end (delta: 197.1 MB). Free memory was 67.8 MB in the beginning and 180.5 MB in the end (delta: -112.7 MB). Peak memory consumption was 84.3 MB. Max. memory is 16.1 GB. [2020-12-09 20:41:54,953 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory was 53.4 MB in the beginning and 53.4 MB in the end (delta: 24.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:41:54,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.17 ms. Allocated memory is still 88.1 MB. Free memory was 67.5 MB in the beginning and 46.3 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 20:41:54,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.10 ms. Allocated memory is still 88.1 MB. Free memory was 46.3 MB in the beginning and 40.5 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 20:41:54,954 INFO L168 Benchmark]: Boogie Preprocessor took 65.33 ms. Allocated memory is still 88.1 MB. Free memory was 40.5 MB in the beginning and 61.4 MB in the end (delta: -20.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:41:54,955 INFO L168 Benchmark]: RCFGBuilder took 1196.08 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 61.4 MB in the beginning and 50.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 44.4 MB. Max. memory is 16.1 GB. [2020-12-09 20:41:54,955 INFO L168 Benchmark]: TraceAbstraction took 7427.35 ms. Allocated memory was 107.0 MB in the beginning and 285.2 MB in the end (delta: 178.3 MB). Free memory was 49.4 MB in the beginning and 196.2 MB in the end (delta: -146.8 MB). Peak memory consumption was 143.3 MB. Max. memory is 16.1 GB. [2020-12-09 20:41:54,955 INFO L168 Benchmark]: Witness Printer took 129.76 ms. Allocated memory is still 285.2 MB. Free memory was 195.2 MB in the beginning and 180.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 20:41:54,957 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory was 53.4 MB in the beginning and 53.4 MB in the end (delta: 24.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 377.17 ms. Allocated memory is still 88.1 MB. Free memory was 67.5 MB in the beginning and 46.3 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.10 ms. Allocated memory is still 88.1 MB. Free memory was 46.3 MB in the beginning and 40.5 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.33 ms. Allocated memory is still 88.1 MB. Free memory was 40.5 MB in the beginning and 61.4 MB in the end (delta: -20.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1196.08 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 61.4 MB in the beginning and 50.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 44.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7427.35 ms. Allocated memory was 107.0 MB in the beginning and 285.2 MB in the end (delta: 178.3 MB). Free memory was 49.4 MB in the beginning and 196.2 MB in the end (delta: -146.8 MB). Peak memory consumption was 143.3 MB. Max. memory is 16.1 GB. * Witness Printer took 129.76 ms. Allocated memory is still 285.2 MB. Free memory was 195.2 MB in the beginning and 180.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 474]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 4 && a21 <= 0) && a8 <= 13) || ((a16 <= 4 && !(a17 == 1)) && a8 <= 13)) || (a21 == 1 && 15 <= a8)) || ((a21 == 1 && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && a20 == 1)) || ((!(a17 == 1) && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a8 <= 13)) || (((a21 == 1 && 13 < a8) && a16 <= 5) && a20 == 1)) || (((a16 <= 5 && !(a17 == 1)) && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && !(a20 == 1))) || ((a21 <= 0 && a20 == 1) && a8 <= 13)) || (((13 < a8 && a16 <= 5) && !(a17 == 1)) && !(a20 == 1)) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 4 && a21 <= 0) && a8 <= 13) || ((a16 <= 4 && !(a17 == 1)) && a8 <= 13)) || (a21 == 1 && 15 <= a8)) || ((a21 == 1 && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && a20 == 1)) || ((!(a17 == 1) && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a8 <= 13)) || (((a21 == 1 && 13 < a8) && a16 <= 5) && a20 == 1)) || (((a16 <= 5 && !(a17 == 1)) && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && !(a20 == 1))) || ((a21 <= 0 && a20 == 1) && a8 <= 13)) || (((13 < a8 && a16 <= 5) && !(a17 == 1)) && !(a20 == 1)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.9s, OverallIterations: 14, TraceHistogramMax: 7, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 700 SDtfs, 997 SDslu, 67 SDs, 0 SdLazy, 3275 SolverSat, 735 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1193 GetRequests, 1168 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1707occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 1562 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 57 NumberOfFragments, 301 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3710 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 180 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 2255 NumberOfCodeBlocks, 2255 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2815 ConstructedInterpolants, 0 QuantifiedInterpolants, 1015526 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1378 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 2813/2846 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...