./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label12.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_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label12.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/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 74057909fb6c276d17d8009abfa8a9d3a5bed6a1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:06:32,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:06:32,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:06:32,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:06:32,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:06:32,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:06:32,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:06:32,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:06:32,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:06:32,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:06:32,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:06:32,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:06:32,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:06:32,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:06:32,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:06:32,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:06:32,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:06:32,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:06:32,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:06:32,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:06:32,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:06:32,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:06:32,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:06:32,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:06:32,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:06:32,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:06:32,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:06:32,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:06:32,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:06:32,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:06:32,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:06:32,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:06:32,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:06:32,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:06:32,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:06:32,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:06:32,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:06:32,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:06:32,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:06:32,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:06:32,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:06:32,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:06:32,711 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:06:32,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:06:32,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:06:32,714 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:06:32,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:06:32,714 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:06:32,715 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:06:32,715 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:06:32,715 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:06:32,715 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:06:32,716 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:06:32,717 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:06:32,717 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:06:32,717 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:06:32,718 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:06:32,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:06:32,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:06:32,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:06:32,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:06:32,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:06:32,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:06:32,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:06:32,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:06:32,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:06:32,721 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:06:32,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:06:32,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:06:32,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:06:32,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:06:32,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:06:32,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:06:32,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:32,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:06:32,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:06:32,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:06:32,724 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:06:32,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:06:32,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:06:32,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:06:32,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:06:32,725 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_7ca7793d-edeb-4427-9ac1-5696d2bd5473/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74057909fb6c276d17d8009abfa8a9d3a5bed6a1 [2020-11-22 13:06:33,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:06:33,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:06:33,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:06:33,133 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:06:33,134 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:06:33,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label12.c [2020-11-22 13:06:33,207 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/data/b6fd4100c/7f4d0ffef93d41f6af22b4108b8ac046/FLAG29ee431d6 [2020-11-22 13:06:33,927 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:33,928 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/sv-benchmarks/c/eca-rers2012/Problem01_label12.c [2020-11-22 13:06:33,940 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/data/b6fd4100c/7f4d0ffef93d41f6af22b4108b8ac046/FLAG29ee431d6 [2020-11-22 13:06:34,100 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/data/b6fd4100c/7f4d0ffef93d41f6af22b4108b8ac046 [2020-11-22 13:06:34,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:34,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:34,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:34,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:34,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:34,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3191f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34, skipping insertion in model container [2020-11-22 13:06:34,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:34,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:34,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:34,572 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:06:34,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:34,779 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:06:34,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34 WrapperNode [2020-11-22 13:06:34,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:34,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:34,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:06:34,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:06:34,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:34,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:06:34,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:06:34,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:06:34,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... [2020-11-22 13:06:34,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:06:34,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:06:34,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:06:34,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:06:34,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:06:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:06:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:06:35,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:06:37,533 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:06:37,533 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-22 13:06:37,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:37 BoogieIcfgContainer [2020-11-22 13:06:37,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:06:37,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:06:37,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:06:37,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:06:37,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:06:34" (1/3) ... [2020-11-22 13:06:37,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602497e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:37, skipping insertion in model container [2020-11-22 13:06:37,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:34" (2/3) ... [2020-11-22 13:06:37,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602497e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:37, skipping insertion in model container [2020-11-22 13:06:37,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:37" (3/3) ... [2020-11-22 13:06:37,544 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label12.c [2020-11-22 13:06:37,555 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:06:37,560 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:06:37,572 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:06:37,596 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:06:37,596 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:06:37,596 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:06:37,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:06:37,596 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:06:37,597 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:06:37,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:06:37,597 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:06:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-22 13:06:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-22 13:06:37,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:37,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:37,620 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:37,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712557, now seen corresponding path program 1 times [2020-11-22 13:06:37,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:37,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988676393] [2020-11-22 13:06:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:38,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988676393] [2020-11-22 13:06:38,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:38,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:38,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774577283] [2020-11-22 13:06:38,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:38,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:38,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:38,077 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-22 13:06:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:38,700 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-22 13:06:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:38,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-22 13:06:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:38,718 INFO L225 Difference]: With dead ends: 224 [2020-11-22 13:06:38,719 INFO L226 Difference]: Without dead ends: 145 [2020-11-22 13:06:38,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-22 13:06:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-22 13:06:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-22 13:06:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-22 13:06:38,784 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-22 13:06:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:38,785 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-22 13:06:38,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-22 13:06:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-22 13:06:38,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:38,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:38,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:06:38,789 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:38,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1975133630, now seen corresponding path program 1 times [2020-11-22 13:06:38,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:38,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93074777] [2020-11-22 13:06:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:38,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93074777] [2020-11-22 13:06:38,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:38,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:38,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952213195] [2020-11-22 13:06:38,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:38,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:38,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:38,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:38,881 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-22 13:06:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:39,466 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-22 13:06:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:39,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-22 13:06:39,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:39,472 INFO L225 Difference]: With dead ends: 431 [2020-11-22 13:06:39,472 INFO L226 Difference]: Without dead ends: 287 [2020-11-22 13:06:39,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-22 13:06:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-22 13:06:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-22 13:06:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-11-22 13:06:39,511 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-11-22 13:06:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:39,511 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-11-22 13:06:39,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-11-22 13:06:39,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-22 13:06:39,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:39,525 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] [2020-11-22 13:06:39,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:06:39,526 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:39,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1832086212, now seen corresponding path program 1 times [2020-11-22 13:06:39,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:39,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842793888] [2020-11-22 13:06:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:39,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842793888] [2020-11-22 13:06:39,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:39,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:06:39,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131745925] [2020-11-22 13:06:39,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:06:39,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:39,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:06:39,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:39,874 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 4 states. [2020-11-22 13:06:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:40,661 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2020-11-22 13:06:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:06:40,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-22 13:06:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:40,666 INFO L225 Difference]: With dead ends: 784 [2020-11-22 13:06:40,667 INFO L226 Difference]: Without dead ends: 429 [2020-11-22 13:06:40,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-22 13:06:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-11-22 13:06:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-11-22 13:06:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 557 transitions. [2020-11-22 13:06:40,710 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 557 transitions. Word has length 78 [2020-11-22 13:06:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:40,711 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 557 transitions. [2020-11-22 13:06:40,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:06:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 557 transitions. [2020-11-22 13:06:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-22 13:06:40,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:40,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:40,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:06:40,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash 102972183, now seen corresponding path program 1 times [2020-11-22 13:06:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:40,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419075119] [2020-11-22 13:06:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:40,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419075119] [2020-11-22 13:06:40,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:40,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:06:40,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845563821] [2020-11-22 13:06:40,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:06:40,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:40,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:06:40,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:40,821 INFO L87 Difference]: Start difference. First operand 429 states and 557 transitions. Second operand 4 states. [2020-11-22 13:06:41,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:41,434 INFO L93 Difference]: Finished difference Result 999 states and 1360 transitions. [2020-11-22 13:06:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:06:41,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-22 13:06:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:41,439 INFO L225 Difference]: With dead ends: 999 [2020-11-22 13:06:41,439 INFO L226 Difference]: Without dead ends: 642 [2020-11-22 13:06:41,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-11-22 13:06:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 571. [2020-11-22 13:06:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-22 13:06:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 776 transitions. [2020-11-22 13:06:41,480 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 776 transitions. Word has length 83 [2020-11-22 13:06:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:41,480 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 776 transitions. [2020-11-22 13:06:41,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:06:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 776 transitions. [2020-11-22 13:06:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-22 13:06:41,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:41,485 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] [2020-11-22 13:06:41,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:06:41,486 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1460487198, now seen corresponding path program 1 times [2020-11-22 13:06:41,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:41,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522247146] [2020-11-22 13:06:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-22 13:06:41,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522247146] [2020-11-22 13:06:41,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:41,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:06:41,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46455768] [2020-11-22 13:06:41,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:41,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:41,592 INFO L87 Difference]: Start difference. First operand 571 states and 776 transitions. Second operand 3 states. [2020-11-22 13:06:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:42,015 INFO L93 Difference]: Finished difference Result 1496 states and 1996 transitions. [2020-11-22 13:06:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:42,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-11-22 13:06:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:42,024 INFO L225 Difference]: With dead ends: 1496 [2020-11-22 13:06:42,024 INFO L226 Difference]: Without dead ends: 926 [2020-11-22 13:06:42,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-22 13:06:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-22 13:06:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-22 13:06:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 954 transitions. [2020-11-22 13:06:42,049 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 954 transitions. Word has length 95 [2020-11-22 13:06:42,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:42,050 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 954 transitions. [2020-11-22 13:06:42,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 954 transitions. [2020-11-22 13:06:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-22 13:06:42,052 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:42,052 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] [2020-11-22 13:06:42,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:06:42,053 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1655711151, now seen corresponding path program 1 times [2020-11-22 13:06:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:42,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17903180] [2020-11-22 13:06:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:42,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17903180] [2020-11-22 13:06:42,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:42,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:06:42,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221985929] [2020-11-22 13:06:42,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:06:42,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:42,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:06:42,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:42,125 INFO L87 Difference]: Start difference. First operand 713 states and 954 transitions. Second operand 4 states. [2020-11-22 13:06:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:42,797 INFO L93 Difference]: Finished difference Result 1638 states and 2226 transitions. [2020-11-22 13:06:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:06:42,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-11-22 13:06:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:42,807 INFO L225 Difference]: With dead ends: 1638 [2020-11-22 13:06:42,807 INFO L226 Difference]: Without dead ends: 926 [2020-11-22 13:06:42,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-22 13:06:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-22 13:06:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-22 13:06:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 948 transitions. [2020-11-22 13:06:42,842 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 948 transitions. Word has length 101 [2020-11-22 13:06:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:42,843 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 948 transitions. [2020-11-22 13:06:42,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:06:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 948 transitions. [2020-11-22 13:06:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-22 13:06:42,851 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:42,852 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] [2020-11-22 13:06:42,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:06:42,852 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash 224023892, now seen corresponding path program 1 times [2020-11-22 13:06:42,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:42,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574306212] [2020-11-22 13:06:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-22 13:06:42,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574306212] [2020-11-22 13:06:42,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:42,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:06:42,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343033852] [2020-11-22 13:06:42,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:06:42,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:42,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:06:42,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:42,937 INFO L87 Difference]: Start difference. First operand 713 states and 948 transitions. Second operand 4 states. [2020-11-22 13:06:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:43,552 INFO L93 Difference]: Finished difference Result 1638 states and 2154 transitions. [2020-11-22 13:06:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:06:43,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-11-22 13:06:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:43,560 INFO L225 Difference]: With dead ends: 1638 [2020-11-22 13:06:43,560 INFO L226 Difference]: Without dead ends: 926 [2020-11-22 13:06:43,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:06:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-22 13:06:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 855. [2020-11-22 13:06:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-22 13:06:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1109 transitions. [2020-11-22 13:06:43,589 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1109 transitions. Word has length 115 [2020-11-22 13:06:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:43,590 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1109 transitions. [2020-11-22 13:06:43,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:06:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1109 transitions. [2020-11-22 13:06:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-22 13:06:43,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:43,595 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] [2020-11-22 13:06:43,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:06:43,595 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1209429159, now seen corresponding path program 1 times [2020-11-22 13:06:43,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:43,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692471424] [2020-11-22 13:06:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-22 13:06:43,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692471424] [2020-11-22 13:06:43,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:43,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:06:43,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571308536] [2020-11-22 13:06:43,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:43,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:43,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:43,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:43,747 INFO L87 Difference]: Start difference. First operand 855 states and 1109 transitions. Second operand 3 states. [2020-11-22 13:06:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:44,163 INFO L93 Difference]: Finished difference Result 1922 states and 2468 transitions. [2020-11-22 13:06:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:44,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-11-22 13:06:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:44,170 INFO L225 Difference]: With dead ends: 1922 [2020-11-22 13:06:44,170 INFO L226 Difference]: Without dead ends: 1068 [2020-11-22 13:06:44,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-11-22 13:06:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2020-11-22 13:06:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-22 13:06:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1201 transitions. [2020-11-22 13:06:44,201 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1201 transitions. Word has length 132 [2020-11-22 13:06:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:44,201 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1201 transitions. [2020-11-22 13:06:44,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1201 transitions. [2020-11-22 13:06:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-22 13:06:44,204 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:44,205 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] [2020-11-22 13:06:44,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:06:44,205 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash -585303537, now seen corresponding path program 1 times [2020-11-22 13:06:44,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:44,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093646896] [2020-11-22 13:06:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-22 13:06:44,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093646896] [2020-11-22 13:06:44,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:44,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:06:44,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492267171] [2020-11-22 13:06:44,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:44,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:44,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:44,342 INFO L87 Difference]: Start difference. First operand 926 states and 1201 transitions. Second operand 3 states. [2020-11-22 13:06:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:44,783 INFO L93 Difference]: Finished difference Result 2064 states and 2658 transitions. [2020-11-22 13:06:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:44,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2020-11-22 13:06:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:44,790 INFO L225 Difference]: With dead ends: 2064 [2020-11-22 13:06:44,790 INFO L226 Difference]: Without dead ends: 1139 [2020-11-22 13:06:44,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-22 13:06:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2020-11-22 13:06:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-22 13:06:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1357 transitions. [2020-11-22 13:06:44,822 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1357 transitions. Word has length 175 [2020-11-22 13:06:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:44,823 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1357 transitions. [2020-11-22 13:06:44,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1357 transitions. [2020-11-22 13:06:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-11-22 13:06:44,827 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:44,827 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] [2020-11-22 13:06:44,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:06:44,828 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:44,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1756891400, now seen corresponding path program 1 times [2020-11-22 13:06:44,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:44,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843853277] [2020-11-22 13:06:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 159 proven. 35 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-22 13:06:45,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843853277] [2020-11-22 13:06:45,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417921304] [2020-11-22 13:06:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 13:06:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-22 13:06:45,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-22 13:06:45,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:06:45,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-22 13:06:45,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160748543] [2020-11-22 13:06:45,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:45,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:45,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:45,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:06:45,685 INFO L87 Difference]: Start difference. First operand 1068 states and 1357 transitions. Second operand 3 states. [2020-11-22 13:06:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:46,151 INFO L93 Difference]: Finished difference Result 2561 states and 3277 transitions. [2020-11-22 13:06:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:46,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2020-11-22 13:06:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:46,160 INFO L225 Difference]: With dead ends: 2561 [2020-11-22 13:06:46,161 INFO L226 Difference]: Without dead ends: 1494 [2020-11-22 13:06:46,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:06:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-11-22 13:06:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1281. [2020-11-22 13:06:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-22 13:06:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1649 transitions. [2020-11-22 13:06:46,203 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1649 transitions. Word has length 188 [2020-11-22 13:06:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:46,204 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1649 transitions. [2020-11-22 13:06:46,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1649 transitions. [2020-11-22 13:06:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-22 13:06:46,208 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:46,208 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] [2020-11-22 13:06:46,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-22 13:06:46,424 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash 15738918, now seen corresponding path program 1 times [2020-11-22 13:06:46,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:46,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839398482] [2020-11-22 13:06:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-22 13:06:46,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839398482] [2020-11-22 13:06:46,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:46,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:06:46,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646771528] [2020-11-22 13:06:46,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:46,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:46,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:46,637 INFO L87 Difference]: Start difference. First operand 1281 states and 1649 transitions. Second operand 3 states. [2020-11-22 13:06:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:47,091 INFO L93 Difference]: Finished difference Result 2845 states and 3645 transitions. [2020-11-22 13:06:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:47,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2020-11-22 13:06:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:47,097 INFO L225 Difference]: With dead ends: 2845 [2020-11-22 13:06:47,098 INFO L226 Difference]: Without dead ends: 1352 [2020-11-22 13:06:47,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:06:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-22 13:06:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2020-11-22 13:06:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-22 13:06:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1495 transitions. [2020-11-22 13:06:47,135 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1495 transitions. Word has length 197 [2020-11-22 13:06:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:47,135 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1495 transitions. [2020-11-22 13:06:47,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1495 transitions. [2020-11-22 13:06:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-22 13:06:47,140 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:47,140 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-11-22 13:06:47,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:06:47,140 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:47,141 INFO L82 PathProgramCache]: Analyzing trace with hash 413838098, now seen corresponding path program 1 times [2020-11-22 13:06:47,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:47,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628209128] [2020-11-22 13:06:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-11-22 13:06:47,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628209128] [2020-11-22 13:06:47,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42569544] [2020-11-22 13:06:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:47,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 13:06:47,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-22 13:06:47,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-22 13:06:47,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:06:47,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-22 13:06:47,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867076480] [2020-11-22 13:06:47,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:06:47,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:47,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:06:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:06:47,913 INFO L87 Difference]: Start difference. First operand 1210 states and 1495 transitions. Second operand 3 states. [2020-11-22 13:06:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:48,338 INFO L93 Difference]: Finished difference Result 2488 states and 3080 transitions. [2020-11-22 13:06:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:06:48,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-11-22 13:06:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:48,340 INFO L225 Difference]: With dead ends: 2488 [2020-11-22 13:06:48,340 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:06:48,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:06:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:06:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:06:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:06:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:06:48,343 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 216 [2020-11-22 13:06:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:48,343 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:06:48,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:06:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:06:48,344 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:06:48,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-22 13:06:48,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:06:48,928 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-11-22 13:06:49,225 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-11-22 13:06:49,229 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-22 13:06:49,229 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-22 13:06:49,229 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-22 13:06:49,229 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-22 13:06:49,229 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-22 13:06:49,229 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-22 13:06:49,230 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L542-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-22 13:06:49,231 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L545-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L546(line 546) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-22 13:06:49,232 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-22 13:06:49,233 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-22 13:06:49,233 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a16~0 6)) (.cse3 (<= 15 ~a8~0)) (.cse2 (not (= ~a7~0 1))) (.cse7 (= ~a17~0 1)) (.cse4 (<= ~a16~0 5)) (.cse1 (<= ~a17~0 0)) (.cse6 (= ~a20~0 1)) (.cse5 (<= ~a8~0 13))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse2 .cse5) (and .cse1 .cse6) (and .cse0 .cse2 .cse3 .cse7) (and .cse4 .cse2 .cse3 .cse7) (and (= ~a21~0 1) (= ~a12~0 8) .cse6 .cse2 .cse7) (and .cse4 .cse7 .cse5) (and .cse4 .cse1) (and .cse6 .cse5))) [2020-11-22 13:06:49,233 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-22 13:06:49,233 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-22 13:06:49,233 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-22 13:06:49,233 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-22 13:06:49,234 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-22 13:06:49,235 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-22 13:06:49,235 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-22 13:06:49,235 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-22 13:06:49,235 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-22 13:06:49,235 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-22 13:06:49,235 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-22 13:06:49,235 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-22 13:06:49,235 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a16~0 6)) (.cse3 (<= 15 ~a8~0)) (.cse2 (not (= ~a7~0 1))) (.cse7 (= ~a17~0 1)) (.cse4 (<= ~a16~0 5)) (.cse1 (<= ~a17~0 0)) (.cse6 (= ~a20~0 1)) (.cse5 (<= ~a8~0 13))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse2 .cse5) (and .cse1 .cse6) (and .cse0 .cse2 .cse3 .cse7) (and .cse4 .cse2 .cse3 .cse7) (and (= ~a21~0 1) (= ~a12~0 8) .cse6 .cse2 .cse7) (and .cse4 .cse7 .cse5) (and .cse4 .cse1) (and .cse6 .cse5))) [2020-11-22 13:06:49,235 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-22 13:06:49,236 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 13:06:49,238 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-22 13:06:49,238 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-22 13:06:49,238 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-22 13:06:49,239 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-22 13:06:49,239 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-22 13:06:49,239 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-22 13:06:49,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:06:49 BoogieIcfgContainer [2020-11-22 13:06:49,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:06:49,286 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:06:49,286 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:06:49,287 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:06:49,287 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:37" (3/4) ... [2020-11-22 13:06:49,290 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:06:49,319 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-22 13:06:49,321 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-22 13:06:49,323 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-22 13:06:49,324 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:06:49,491 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7ca7793d-edeb-4427-9ac1-5696d2bd5473/bin/utaipan/witness.graphml [2020-11-22 13:06:49,491 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:06:49,492 INFO L168 Benchmark]: Toolchain (without parser) took 15388.25 ms. Allocated memory was 86.0 MB in the beginning and 348.1 MB in the end (delta: 262.1 MB). Free memory was 58.4 MB in the beginning and 288.1 MB in the end (delta: -229.7 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:49,493 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory is still 57.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:49,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 680.08 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 58.3 MB in the beginning and 91.2 MB in the end (delta: -32.9 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:49,494 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.38 ms. Allocated memory is still 117.4 MB. Free memory was 91.2 MB in the beginning and 86.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:49,494 INFO L168 Benchmark]: Boogie Preprocessor took 83.11 ms. Allocated memory is still 117.4 MB. Free memory was 86.2 MB in the beginning and 81.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:49,495 INFO L168 Benchmark]: RCFGBuilder took 2565.59 ms. Allocated memory was 117.4 MB in the beginning and 144.7 MB in the end (delta: 27.3 MB). Free memory was 81.5 MB in the beginning and 102.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 62.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:49,496 INFO L168 Benchmark]: TraceAbstraction took 11748.36 ms. Allocated memory was 144.7 MB in the beginning and 348.1 MB in the end (delta: 203.4 MB). Free memory was 102.9 MB in the beginning and 303.8 MB in the end (delta: -201.0 MB). Peak memory consumption was 182.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:49,496 INFO L168 Benchmark]: Witness Printer took 205.71 ms. Allocated memory is still 348.1 MB. Free memory was 303.8 MB in the beginning and 288.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:49,499 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory is still 57.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 680.08 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 58.3 MB in the beginning and 91.2 MB in the end (delta: -32.9 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 99.38 ms. Allocated memory is still 117.4 MB. Free memory was 91.2 MB in the beginning and 86.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.11 ms. Allocated memory is still 117.4 MB. Free memory was 86.2 MB in the beginning and 81.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2565.59 ms. Allocated memory was 117.4 MB in the beginning and 144.7 MB in the end (delta: 27.3 MB). Free memory was 81.5 MB in the beginning and 102.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 62.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11748.36 ms. Allocated memory was 144.7 MB in the beginning and 348.1 MB in the end (delta: 203.4 MB). Free memory was 102.9 MB in the beginning and 303.8 MB in the end (delta: -201.0 MB). Peak memory consumption was 182.8 MB. Max. memory is 16.1 GB. * Witness Printer took 205.71 ms. Allocated memory is still 348.1 MB. Free memory was 303.8 MB in the beginning and 288.1 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 == 6 && a17 <= 0) && !(a7 == 1)) && 15 <= a8) || ((a16 <= 5 && !(a7 == 1)) && a8 <= 13)) || (a17 <= 0 && a20 == 1)) || (((a16 == 6 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || (((a16 <= 5 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || ((((a21 == 1 && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || (a16 <= 5 && a17 <= 0)) || (a20 == 1 && a8 <= 13) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 == 6 && a17 <= 0) && !(a7 == 1)) && 15 <= a8) || ((a16 <= 5 && !(a7 == 1)) && a8 <= 13)) || (a17 <= 0 && a20 == 1)) || (((a16 == 6 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || (((a16 <= 5 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || ((((a21 == 1 && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || (a16 <= 5 && a17 <= 0)) || (a20 == 1 && a8 <= 13) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.9s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 578 SDtfs, 962 SDslu, 57 SDs, 0 SdLazy, 2767 SolverSat, 693 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 843 GetRequests, 818 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1281occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 1136 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 49 NumberOfFragments, 205 HoareAnnotationTreeSize, 3 FomulaSimplifications, 6960 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 762 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 1932 NumberOfCodeBlocks, 1932 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2320 ConstructedInterpolants, 0 QuantifiedInterpolants, 1363809 SizeOfPredicates, 1 NumberOfNonLiveVariables, 937 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 2023/2144 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...