./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c -s /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/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 ca099a0a865236295bec7881986648360a2333c3 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:27:08,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:27:08,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:27:08,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:27:08,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:27:08,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:27:08,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:27:08,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:27:08,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:27:08,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:27:08,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:27:08,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:27:08,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:27:08,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:27:08,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:27:08,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:27:08,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:27:08,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:27:08,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:27:08,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:27:08,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:27:08,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:27:08,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:27:08,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:27:08,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:27:08,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:27:08,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:27:08,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:27:08,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:27:08,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:27:08,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:27:08,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:27:08,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:27:08,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:27:08,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:27:08,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:27:08,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:27:08,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:27:08,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:27:08,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:27:08,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:27:08,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:27:08,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:27:08,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:27:08,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:27:08,883 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:27:08,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:27:08,884 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:27:08,884 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:27:08,885 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:27:08,885 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:27:08,885 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:27:08,885 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:27:08,886 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:27:08,886 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:27:08,886 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:27:08,886 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:27:08,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:27:08,888 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:27:08,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:27:08,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:27:08,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:27:08,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:27:08,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:27:08,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:27:08,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:27:08,890 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:27:08,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:27:08,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:27:08,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:27:08,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:27:08,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:27:08,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:27:08,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:27:08,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:27:08,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:27:08,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:27:08,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:27:08,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:27:08,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:27:08,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:27:08,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:27:08,894 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_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca099a0a865236295bec7881986648360a2333c3 [2020-11-28 07:27:09,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:27:09,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:27:09,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:27:09,214 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:27:09,215 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:27:09,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c [2020-11-28 07:27:09,304 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/data/ede7c044f/a673549893714d95af2e0bfbcc580395/FLAGa5f50ea10 [2020-11-28 07:27:10,044 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:27:10,045 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/sv-benchmarks/c/eca-rers2012/Problem01_label42.c [2020-11-28 07:27:10,082 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/data/ede7c044f/a673549893714d95af2e0bfbcc580395/FLAGa5f50ea10 [2020-11-28 07:27:10,299 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/data/ede7c044f/a673549893714d95af2e0bfbcc580395 [2020-11-28 07:27:10,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:27:10,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:27:10,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:27:10,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:27:10,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:27:10,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:27:10" (1/1) ... [2020-11-28 07:27:10,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5e54f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:10, skipping insertion in model container [2020-11-28 07:27:10,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:27:10" (1/1) ... [2020-11-28 07:27:10,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:27:10,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:27:10,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:27:10,957 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:27:11,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:27:11,132 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:27:11,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11 WrapperNode [2020-11-28 07:27:11,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:27:11,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:27:11,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:27:11,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:27:11,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:27:11,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:27:11,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:27:11,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:27:11,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... [2020-11-28 07:27:11,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:27:11,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:27:11,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:27:11,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:27:11,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:27:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:27:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:27:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:27:11,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:27:14,291 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:27:14,291 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:27:14,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:27:14 BoogieIcfgContainer [2020-11-28 07:27:14,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:27:14,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:27:14,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:27:14,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:27:14,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:27:10" (1/3) ... [2020-11-28 07:27:14,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a6dc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:27:14, skipping insertion in model container [2020-11-28 07:27:14,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:27:11" (2/3) ... [2020-11-28 07:27:14,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a6dc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:27:14, skipping insertion in model container [2020-11-28 07:27:14,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:27:14" (3/3) ... [2020-11-28 07:27:14,305 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label42.c [2020-11-28 07:27:14,318 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:27:14,323 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:27:14,337 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:27:14,373 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:27:14,373 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:27:14,373 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:27:14,373 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:27:14,374 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:27:14,374 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:27:14,374 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:27:14,374 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:27:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:27:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:27:14,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:14,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:14,414 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1520711277, now seen corresponding path program 1 times [2020-11-28 07:27:14,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:14,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704198766] [2020-11-28 07:27:14,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:15,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704198766] [2020-11-28 07:27:15,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:15,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:15,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146441238] [2020-11-28 07:27:15,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:15,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:15,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:15,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:15,158 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 4 states. [2020-11-28 07:27:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:16,207 INFO L93 Difference]: Finished difference Result 297 states and 569 transitions. [2020-11-28 07:27:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:27:16,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-11-28 07:27:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:16,233 INFO L225 Difference]: With dead ends: 297 [2020-11-28 07:27:16,233 INFO L226 Difference]: Without dead ends: 216 [2020-11-28 07:27:16,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-11-28 07:27:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-11-28 07:27:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-28 07:27:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 336 transitions. [2020-11-28 07:27:16,332 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 336 transitions. Word has length 71 [2020-11-28 07:27:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:16,334 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 336 transitions. [2020-11-28 07:27:16,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 336 transitions. [2020-11-28 07:27:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-28 07:27:16,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:16,348 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] [2020-11-28 07:27:16,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:27:16,349 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:16,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:16,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1832087492, now seen corresponding path program 1 times [2020-11-28 07:27:16,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:16,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825396033] [2020-11-28 07:27:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:16,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825396033] [2020-11-28 07:27:16,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:16,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:16,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020390002] [2020-11-28 07:27:16,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:16,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:16,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:16,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:16,695 INFO L87 Difference]: Start difference. First operand 216 states and 336 transitions. Second operand 4 states. [2020-11-28 07:27:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:17,945 INFO L93 Difference]: Finished difference Result 571 states and 986 transitions. [2020-11-28 07:27:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:27:17,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-28 07:27:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:17,949 INFO L225 Difference]: With dead ends: 571 [2020-11-28 07:27:17,949 INFO L226 Difference]: Without dead ends: 358 [2020-11-28 07:27:17,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-11-28 07:27:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 216. [2020-11-28 07:27:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-28 07:27:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 293 transitions. [2020-11-28 07:27:17,970 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 293 transitions. Word has length 78 [2020-11-28 07:27:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:17,971 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 293 transitions. [2020-11-28 07:27:17,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 293 transitions. [2020-11-28 07:27:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:27:17,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:17,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:17,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:27:17,974 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1009061448, now seen corresponding path program 1 times [2020-11-28 07:27:17,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:17,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426091370] [2020-11-28 07:27:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:18,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426091370] [2020-11-28 07:27:18,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:18,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:18,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836135263] [2020-11-28 07:27:18,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:18,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:18,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:18,124 INFO L87 Difference]: Start difference. First operand 216 states and 293 transitions. Second operand 4 states. [2020-11-28 07:27:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:18,867 INFO L93 Difference]: Finished difference Result 573 states and 802 transitions. [2020-11-28 07:27:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:27:18,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-11-28 07:27:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:18,873 INFO L225 Difference]: With dead ends: 573 [2020-11-28 07:27:18,873 INFO L226 Difference]: Without dead ends: 358 [2020-11-28 07:27:18,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-11-28 07:27:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2020-11-28 07:27:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-11-28 07:27:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 484 transitions. [2020-11-28 07:27:18,920 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 484 transitions. Word has length 86 [2020-11-28 07:27:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:18,920 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 484 transitions. [2020-11-28 07:27:18,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 484 transitions. [2020-11-28 07:27:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-28 07:27:18,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:18,923 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:18,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:27:18,923 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:18,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1460488478, now seen corresponding path program 1 times [2020-11-28 07:27:18,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:18,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770115981] [2020-11-28 07:27:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 07:27:18,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770115981] [2020-11-28 07:27:18,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:18,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:18,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182538648] [2020-11-28 07:27:18,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:18,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:18,995 INFO L87 Difference]: Start difference. First operand 358 states and 484 transitions. Second operand 3 states. [2020-11-28 07:27:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:19,542 INFO L93 Difference]: Finished difference Result 999 states and 1341 transitions. [2020-11-28 07:27:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:19,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-11-28 07:27:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:19,548 INFO L225 Difference]: With dead ends: 999 [2020-11-28 07:27:19,548 INFO L226 Difference]: Without dead ends: 642 [2020-11-28 07:27:19,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-11-28 07:27:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 571. [2020-11-28 07:27:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:27:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 780 transitions. [2020-11-28 07:27:19,616 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 780 transitions. Word has length 95 [2020-11-28 07:27:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:19,618 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 780 transitions. [2020-11-28 07:27:19,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 780 transitions. [2020-11-28 07:27:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-28 07:27:19,621 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:19,621 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:27:19,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:27:19,622 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1655712431, now seen corresponding path program 1 times [2020-11-28 07:27:19,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:19,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75029992] [2020-11-28 07:27:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:19,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75029992] [2020-11-28 07:27:19,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:19,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:27:19,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540916705] [2020-11-28 07:27:19,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:19,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:19,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:19,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:19,741 INFO L87 Difference]: Start difference. First operand 571 states and 780 transitions. Second operand 4 states. [2020-11-28 07:27:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:20,521 INFO L93 Difference]: Finished difference Result 1496 states and 2088 transitions. [2020-11-28 07:27:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:27:20,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-11-28 07:27:20,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:20,528 INFO L225 Difference]: With dead ends: 1496 [2020-11-28 07:27:20,529 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:27:20,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:27:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-28 07:27:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:27:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 958 transitions. [2020-11-28 07:27:20,563 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 958 transitions. Word has length 101 [2020-11-28 07:27:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:20,563 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 958 transitions. [2020-11-28 07:27:20,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 958 transitions. [2020-11-28 07:27:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-28 07:27:20,566 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:20,566 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:20,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:27:20,567 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash 224022612, now seen corresponding path program 1 times [2020-11-28 07:27:20,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:20,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106543] [2020-11-28 07:27:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 07:27:20,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106543] [2020-11-28 07:27:20,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:20,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:20,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656336744] [2020-11-28 07:27:20,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:27:20,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:20,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:27:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:20,674 INFO L87 Difference]: Start difference. First operand 713 states and 958 transitions. Second operand 4 states. [2020-11-28 07:27:21,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:21,405 INFO L93 Difference]: Finished difference Result 1638 states and 2178 transitions. [2020-11-28 07:27:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:27:21,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-11-28 07:27:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:21,419 INFO L225 Difference]: With dead ends: 1638 [2020-11-28 07:27:21,419 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:27:21,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:27:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:27:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 855. [2020-11-28 07:27:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-28 07:27:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1123 transitions. [2020-11-28 07:27:21,460 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1123 transitions. Word has length 115 [2020-11-28 07:27:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:21,463 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1123 transitions. [2020-11-28 07:27:21,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:27:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1123 transitions. [2020-11-28 07:27:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-28 07:27:21,479 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:21,479 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-11-28 07:27:21,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:27:21,480 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:21,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1209427879, now seen corresponding path program 1 times [2020-11-28 07:27:21,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:21,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029509325] [2020-11-28 07:27:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 07:27:21,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029509325] [2020-11-28 07:27:21,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:21,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:21,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804462793] [2020-11-28 07:27:21,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:21,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:21,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:21,664 INFO L87 Difference]: Start difference. First operand 855 states and 1123 transitions. Second operand 3 states. [2020-11-28 07:27:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:22,141 INFO L93 Difference]: Finished difference Result 1922 states and 2496 transitions. [2020-11-28 07:27:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:22,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-11-28 07:27:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:22,151 INFO L225 Difference]: With dead ends: 1922 [2020-11-28 07:27:22,151 INFO L226 Difference]: Without dead ends: 1068 [2020-11-28 07:27:22,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:22,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-11-28 07:27:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2020-11-28 07:27:22,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:27:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1209 transitions. [2020-11-28 07:27:22,188 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1209 transitions. Word has length 132 [2020-11-28 07:27:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:22,189 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1209 transitions. [2020-11-28 07:27:22,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:22,189 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1209 transitions. [2020-11-28 07:27:22,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-28 07:27:22,193 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:22,193 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:22,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:27:22,194 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash 223930933, now seen corresponding path program 1 times [2020-11-28 07:27:22,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:22,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863715661] [2020-11-28 07:27:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:27:22,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863715661] [2020-11-28 07:27:22,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387738123] [2020-11-28 07:27:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:27:23,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 07:27:23,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 07:27:23,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:27:23,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:27:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151520959] [2020-11-28 07:27:23,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:23,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:23,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:27:23,417 INFO L87 Difference]: Start difference. First operand 926 states and 1209 transitions. Second operand 3 states. [2020-11-28 07:27:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:24,121 INFO L93 Difference]: Finished difference Result 1851 states and 2417 transitions. [2020-11-28 07:27:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:24,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2020-11-28 07:27:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:24,131 INFO L225 Difference]: With dead ends: 1851 [2020-11-28 07:27:24,131 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:27:24,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:27:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:27:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-28 07:27:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:27:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 868 transitions. [2020-11-28 07:27:24,167 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 868 transitions. Word has length 175 [2020-11-28 07:27:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:24,168 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 868 transitions. [2020-11-28 07:27:24,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 868 transitions. [2020-11-28 07:27:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-28 07:27:24,172 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:24,172 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 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] [2020-11-28 07:27:24,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-28 07:27:24,395 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash -585304817, now seen corresponding path program 1 times [2020-11-28 07:27:24,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:24,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839846115] [2020-11-28 07:27:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-28 07:27:24,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839846115] [2020-11-28 07:27:24,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:27:24,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:27:24,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47464345] [2020-11-28 07:27:24,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:24,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:24,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:24,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:24,553 INFO L87 Difference]: Start difference. First operand 713 states and 868 transitions. Second operand 3 states. [2020-11-28 07:27:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:25,092 INFO L93 Difference]: Finished difference Result 1709 states and 2079 transitions. [2020-11-28 07:27:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:25,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2020-11-28 07:27:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:25,099 INFO L225 Difference]: With dead ends: 1709 [2020-11-28 07:27:25,101 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:27:25,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:27:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:27:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2020-11-28 07:27:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:27:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1113 transitions. [2020-11-28 07:27:25,136 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1113 transitions. Word has length 175 [2020-11-28 07:27:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:25,136 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1113 transitions. [2020-11-28 07:27:25,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1113 transitions. [2020-11-28 07:27:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-11-28 07:27:25,140 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:25,141 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:25,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:27:25,142 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:25,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:25,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1756890120, now seen corresponding path program 1 times [2020-11-28 07:27:25,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:25,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594774499] [2020-11-28 07:27:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 159 proven. 35 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-28 07:27:25,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594774499] [2020-11-28 07:27:25,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308081267] [2020-11-28 07:27:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:27:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:25,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:27:25,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-28 07:27:25,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-28 07:27:25,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:27:25,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:27:25,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909847736] [2020-11-28 07:27:25,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:25,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:27:25,792 INFO L87 Difference]: Start difference. First operand 926 states and 1113 transitions. Second operand 3 states. [2020-11-28 07:27:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:26,351 INFO L93 Difference]: Finished difference Result 2135 states and 2551 transitions. [2020-11-28 07:27:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:26,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2020-11-28 07:27:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:26,360 INFO L225 Difference]: With dead ends: 2135 [2020-11-28 07:27:26,360 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:27:26,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:27:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:27:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1068. [2020-11-28 07:27:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:27:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1279 transitions. [2020-11-28 07:27:26,403 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1279 transitions. Word has length 188 [2020-11-28 07:27:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:26,403 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1279 transitions. [2020-11-28 07:27:26,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1279 transitions. [2020-11-28 07:27:26,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-28 07:27:26,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:27:26,409 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:27:26,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-28 07:27:26,635 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:27:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:27:26,636 INFO L82 PathProgramCache]: Analyzing trace with hash 15737638, now seen corresponding path program 1 times [2020-11-28 07:27:26,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:27:26,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375688850] [2020-11-28 07:27:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:27:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 124 proven. 67 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:27:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375688850] [2020-11-28 07:27:26,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514427522] [2020-11-28 07:27:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/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 [2020-11-28 07:27:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:27:26,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:27:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:27:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-28 07:27:27,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:27:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-28 07:27:27,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:27:27,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:27:27,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144896509] [2020-11-28 07:27:27,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:27:27,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:27:27,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:27:27,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:27:27,141 INFO L87 Difference]: Start difference. First operand 1068 states and 1279 transitions. Second operand 3 states. [2020-11-28 07:27:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:27:27,645 INFO L93 Difference]: Finished difference Result 2133 states and 2556 transitions. [2020-11-28 07:27:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:27:27,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2020-11-28 07:27:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:27:27,647 INFO L225 Difference]: With dead ends: 2133 [2020-11-28 07:27:27,648 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:27:27,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 393 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:27:27,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:27:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:27:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:27:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:27:27,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 197 [2020-11-28 07:27:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:27:27,652 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:27:27,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:27:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:27:27,653 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:27:27,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-28 07:27:27,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:27:28,367 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-11-28 07:27:28,714 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-11-28 07:27:28,718 INFO L274 CegarLoopResult]: For program point L531(line 531) no Hoare annotation was computed. [2020-11-28 07:27:28,719 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:27:28,719 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:27:28,719 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:27:28,719 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:27:28,719 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:27:28,719 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:27:28,719 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:27:28,719 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:27:28,720 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:27:28,720 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:27:28,720 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:27:28,720 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:27:28,720 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:27:28,720 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:27:28,720 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:27:28,721 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:27:28,721 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:27:28,721 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:27:28,721 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:27:28,721 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:27:28,721 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:27:28,721 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:27:28,721 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:27:28,722 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:27:28,722 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:27:28,722 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:27:28,722 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:27:28,722 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:27:28,722 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:27:28,722 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:27:28,722 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:27:28,723 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:27:28,723 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:27:28,723 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:27:28,723 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:27:28,723 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:27:28,723 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:27:28,723 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:27:28,724 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:27:28,724 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:27:28,724 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse8 (= ~a8~0 13))) (let ((.cse1 (<= ~a21~0 0)) (.cse6 (= ~a21~0 1)) (.cse7 (= ~a12~0 8)) (.cse9 (= ~a20~0 1)) (.cse4 (not (= ~a7~0 1))) (.cse2 (= ~a17~0 1)) (.cse0 (<= ~a16~0 5)) (.cse5 (not .cse8)) (.cse3 (<= ~a17~0 0))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4) (and .cse3 .cse5 .cse4) (and .cse3 .cse1) (and .cse0 .cse5 .cse4 .cse2) (and .cse6 .cse7 .cse8 .cse9 (= ~a16~0 4) .cse2) (and .cse6 .cse7 .cse9 .cse4 .cse2) (and (= ~a16~0 6) .cse5 .cse4 .cse2) (and .cse0 .cse5 .cse3)))) [2020-11-28 07:27:28,724 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:27:28,725 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:27:28,725 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:27:28,725 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:27:28,725 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:27:28,725 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:27:28,725 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:27:28,725 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:27:28,726 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:27:28,726 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:27:28,726 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:27:28,726 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:27:28,726 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:27:28,726 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:27:28,726 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:27:28,726 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:27:28,727 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:27:28,727 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:27:28,727 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:27:28,727 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:27:28,727 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:27:28,727 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:27:28,727 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:27:28,728 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse8 (= ~a8~0 13))) (let ((.cse1 (<= ~a21~0 0)) (.cse6 (= ~a21~0 1)) (.cse7 (= ~a12~0 8)) (.cse9 (= ~a20~0 1)) (.cse4 (not (= ~a7~0 1))) (.cse2 (= ~a17~0 1)) (.cse0 (<= ~a16~0 5)) (.cse5 (not .cse8)) (.cse3 (<= ~a17~0 0))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4) (and .cse3 .cse5 .cse4) (and .cse3 .cse1) (and .cse0 .cse5 .cse4 .cse2) (and .cse6 .cse7 .cse8 .cse9 (= ~a16~0 4) .cse2) (and .cse6 .cse7 .cse9 .cse4 .cse2) (and (= ~a16~0 6) .cse5 .cse4 .cse2) (and .cse0 .cse5 .cse3)))) [2020-11-28 07:27:28,728 INFO L274 CegarLoopResult]: For program point L527-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:27:28,728 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:27:28,728 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:27:28,729 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:27:28,729 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:27:28,729 INFO L274 CegarLoopResult]: For program point L530-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:27:28,729 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:27:28,729 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:27:28,729 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:27:28,729 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:27:28,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:27:28 BoogieIcfgContainer [2020-11-28 07:27:28,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:27:28,781 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:27:28,782 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:27:28,782 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:27:28,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:27:14" (3/4) ... [2020-11-28 07:27:28,786 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:27:28,839 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-28 07:27:28,843 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:27:28,845 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 07:27:28,848 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:27:29,072 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_339065e8-aec9-44e9-8b9d-60b3fda6a4fb/bin/utaipan/witness.graphml [2020-11-28 07:27:29,072 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:27:29,073 INFO L168 Benchmark]: Toolchain (without parser) took 18768.11 ms. Allocated memory was 125.8 MB in the beginning and 341.8 MB in the end (delta: 216.0 MB). Free memory was 91.7 MB in the beginning and 237.4 MB in the end (delta: -145.7 MB). Peak memory consumption was 69.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:29,074 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory was 39.6 MB in the beginning and 39.6 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:27:29,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 823.85 ms. Allocated memory is still 125.8 MB. Free memory was 91.5 MB in the beginning and 84.3 MB in the end (delta: 7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:29,075 INFO L168 Benchmark]: Boogie Procedure Inliner took 122.01 ms. Allocated memory is still 125.8 MB. Free memory was 84.3 MB in the beginning and 78.8 MB in the end (delta: 5.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:29,075 INFO L168 Benchmark]: Boogie Preprocessor took 93.89 ms. Allocated memory is still 125.8 MB. Free memory was 78.8 MB in the beginning and 73.8 MB in the end (delta: 4.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:29,076 INFO L168 Benchmark]: RCFGBuilder took 2928.82 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 73.8 MB in the beginning and 122.7 MB in the end (delta: -48.8 MB). Peak memory consumption was 54.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:29,076 INFO L168 Benchmark]: TraceAbstraction took 14484.68 ms. Allocated memory was 157.3 MB in the beginning and 341.8 MB in the end (delta: 184.5 MB). Free memory was 122.7 MB in the beginning and 253.1 MB in the end (delta: -130.4 MB). Peak memory consumption was 167.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:29,077 INFO L168 Benchmark]: Witness Printer took 291.09 ms. Allocated memory is still 341.8 MB. Free memory was 253.1 MB in the beginning and 237.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:27:29,080 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory was 39.6 MB in the beginning and 39.6 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 823.85 ms. Allocated memory is still 125.8 MB. Free memory was 91.5 MB in the beginning and 84.3 MB in the end (delta: 7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 122.01 ms. Allocated memory is still 125.8 MB. Free memory was 84.3 MB in the beginning and 78.8 MB in the end (delta: 5.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 93.89 ms. Allocated memory is still 125.8 MB. Free memory was 78.8 MB in the beginning and 73.8 MB in the end (delta: 4.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2928.82 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 73.8 MB in the beginning and 122.7 MB in the end (delta: -48.8 MB). Peak memory consumption was 54.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14484.68 ms. Allocated memory was 157.3 MB in the beginning and 341.8 MB in the end (delta: 184.5 MB). Free memory was 122.7 MB in the beginning and 253.1 MB in the end (delta: -130.4 MB). Peak memory consumption was 167.4 MB. Max. memory is 16.1 GB. * Witness Printer took 291.09 ms. Allocated memory is still 341.8 MB. Free memory was 253.1 MB in the beginning and 237.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || ((a16 <= 5 && a17 <= 0) && !(a7 == 1))) || ((a17 <= 0 && !(a8 == 13)) && !(a7 == 1))) || (a17 <= 0 && a21 <= 0)) || (((a16 <= 5 && !(a8 == 13)) && !(a7 == 1)) && a17 == 1)) || (((((a21 == 1 && a12 == 8) && a8 == 13) && a20 == 1) && a16 == 4) && a17 == 1)) || ((((a21 == 1 && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (((a16 == 6 && !(a8 == 13)) && !(a7 == 1)) && a17 == 1)) || ((a16 <= 5 && !(a8 == 13)) && a17 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || ((a16 <= 5 && a17 <= 0) && !(a7 == 1))) || ((a17 <= 0 && !(a8 == 13)) && !(a7 == 1))) || (a17 <= 0 && a21 <= 0)) || (((a16 <= 5 && !(a8 == 13)) && !(a7 == 1)) && a17 == 1)) || (((((a21 == 1 && a12 == 8) && a8 == 13) && a20 == 1) && a16 == 4) && a17 == 1)) || ((((a21 == 1 && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (((a16 == 6 && !(a8 == 13)) && !(a7 == 1)) && a17 == 1)) || ((a16 <= 5 && !(a8 == 13)) && a17 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.4s, OverallIterations: 11, TraceHistogramMax: 6, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 559 SDtfs, 1020 SDslu, 58 SDs, 0 SdLazy, 2701 SolverSat, 760 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1154 GetRequests, 1125 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1068occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 1065 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 38 NumberOfFragments, 237 HoareAnnotationTreeSize, 3 FomulaSimplifications, 4720 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 640 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1973 NumberOfCodeBlocks, 1973 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2516 ConstructedInterpolants, 0 QuantifiedInterpolants, 1692432 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1294 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 17 InterpolantComputations, 14 PerfectInterpolantSequences, 2024/2218 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...