./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_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label12.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/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 [2020-11-28 07:41:29,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:29,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:29,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:29,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:29,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:29,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:29,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:29,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:29,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:29,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:29,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:29,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:29,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:29,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:29,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:29,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:29,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:29,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:29,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:29,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:29,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:29,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:29,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:29,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:29,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:29,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:29,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:29,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:29,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:29,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:29,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:29,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:29,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:29,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:29,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:29,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:29,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:29,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:29,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:29,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:29,573 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:41:29,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:29,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:29,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:29,617 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:29,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:29,617 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:29,618 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:29,618 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:29,618 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:29,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:29,620 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:29,620 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:29,620 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:29,621 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:29,621 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:29,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:29,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:29,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:29,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:29,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:29,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:41:29,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:29,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:41:29,625 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:29,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:29,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:41:29,626 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:29,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:41:29,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:29,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:29,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:29,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:29,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:29,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:29,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:41:29,630 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:29,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:29,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:41:29,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:29,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:29,632 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_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74057909fb6c276d17d8009abfa8a9d3a5bed6a1 [2020-11-28 07:41:29,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:29,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:29,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:29,947 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:29,948 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:29,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label12.c [2020-11-28 07:41:30,039 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/data/fc097c6cc/b3e5f8d58b0d4d34ab309673955ecd7a/FLAGd738b20b6 [2020-11-28 07:41:30,665 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:30,667 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/sv-benchmarks/c/eca-rers2012/Problem01_label12.c [2020-11-28 07:41:30,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/data/fc097c6cc/b3e5f8d58b0d4d34ab309673955ecd7a/FLAGd738b20b6 [2020-11-28 07:41:30,910 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/data/fc097c6cc/b3e5f8d58b0d4d34ab309673955ecd7a [2020-11-28 07:41:30,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:30,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:30,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:30,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:30,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:30,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:30" (1/1) ... [2020-11-28 07:41:30,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a3cd08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:30, skipping insertion in model container [2020-11-28 07:41:30,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:30" (1/1) ... [2020-11-28 07:41:30,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:31,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:31,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:31,474 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:31,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:31,621 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:31,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31 WrapperNode [2020-11-28 07:41:31,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:31,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:31,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:31,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:31,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:31,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:31,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:31,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:31,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:31,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:31,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:31,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:31,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:41:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:41:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:31,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:33,877 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:33,878 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:41:33,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:33 BoogieIcfgContainer [2020-11-28 07:41:33,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:33,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:33,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:33,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:33,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:30" (1/3) ... [2020-11-28 07:41:33,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f3abb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:33, skipping insertion in model container [2020-11-28 07:41:33,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (2/3) ... [2020-11-28 07:41:33,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f3abb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:33, skipping insertion in model container [2020-11-28 07:41:33,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:33" (3/3) ... [2020-11-28 07:41:33,890 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label12.c [2020-11-28 07:41:33,904 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:33,909 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:41:33,921 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:41:33,956 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:33,956 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:41:33,957 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:33,957 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:33,957 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:33,957 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:33,957 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:33,958 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:41:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:41:33,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:33,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:33,991 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:33,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712557, now seen corresponding path program 1 times [2020-11-28 07:41:34,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:34,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605098201] [2020-11-28 07:41:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:34,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605098201] [2020-11-28 07:41:34,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:34,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:34,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677446189] [2020-11-28 07:41:34,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:34,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:34,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:34,467 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:41:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:35,022 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:41:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:35,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:41:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:35,043 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:41:35,044 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:41:35,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:41:35,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:41:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:41:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-28 07:41:35,122 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-28 07:41:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:35,124 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-28 07:41:35,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-28 07:41:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-28 07:41:35,130 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:35,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:35,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:41:35,130 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1975133630, now seen corresponding path program 1 times [2020-11-28 07:41:35,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:35,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091009067] [2020-11-28 07:41:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:35,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091009067] [2020-11-28 07:41:35,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:35,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:35,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987419647] [2020-11-28 07:41:35,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:35,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:35,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:35,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:35,231 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-28 07:41:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:35,718 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-28 07:41:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:35,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-28 07:41:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:35,723 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:41:35,723 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:41:35,724 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 [2020-11-28 07:41:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:41:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:41:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:41:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-11-28 07:41:35,743 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-11-28 07:41:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:35,743 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-11-28 07:41:35,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-11-28 07:41:35,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-28 07:41:35,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:35,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:35,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:41:35,747 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1832086212, now seen corresponding path program 1 times [2020-11-28 07:41:35,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:35,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806635444] [2020-11-28 07:41:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:36,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806635444] [2020-11-28 07:41:36,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:36,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708254889] [2020-11-28 07:41:36,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:36,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:36,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:36,047 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 4 states. [2020-11-28 07:41:36,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:36,806 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2020-11-28 07:41:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:36,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-28 07:41:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:36,811 INFO L225 Difference]: With dead ends: 784 [2020-11-28 07:41:36,811 INFO L226 Difference]: Without dead ends: 429 [2020-11-28 07:41:36,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-28 07:41:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-11-28 07:41:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-11-28 07:41:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 557 transitions. [2020-11-28 07:41:36,851 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 557 transitions. Word has length 78 [2020-11-28 07:41:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:36,851 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 557 transitions. [2020-11-28 07:41:36,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 557 transitions. [2020-11-28 07:41:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-28 07:41:36,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:36,857 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] [2020-11-28 07:41:36,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:41:36,858 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash 102972183, now seen corresponding path program 1 times [2020-11-28 07:41:36,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:36,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432520141] [2020-11-28 07:41:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:36,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432520141] [2020-11-28 07:41:36,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:36,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988304354] [2020-11-28 07:41:36,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:36,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:36,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:36,975 INFO L87 Difference]: Start difference. First operand 429 states and 557 transitions. Second operand 4 states. [2020-11-28 07:41:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:37,463 INFO L93 Difference]: Finished difference Result 999 states and 1360 transitions. [2020-11-28 07:41:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:37,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-28 07:41:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:37,482 INFO L225 Difference]: With dead ends: 999 [2020-11-28 07:41:37,482 INFO L226 Difference]: Without dead ends: 642 [2020-11-28 07:41:37,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:37,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-11-28 07:41:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 571. [2020-11-28 07:41:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:41:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 776 transitions. [2020-11-28 07:41:37,506 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 776 transitions. Word has length 83 [2020-11-28 07:41:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:37,506 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 776 transitions. [2020-11-28 07:41:37,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 776 transitions. [2020-11-28 07:41:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-28 07:41:37,508 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:37,508 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:37,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:41:37,509 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:37,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1460487198, now seen corresponding path program 1 times [2020-11-28 07:41:37,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:37,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539825508] [2020-11-28 07:41:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 07:41:37,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539825508] [2020-11-28 07:41:37,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:37,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:37,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105233759] [2020-11-28 07:41:37,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:37,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:37,559 INFO L87 Difference]: Start difference. First operand 571 states and 776 transitions. Second operand 3 states. [2020-11-28 07:41:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:37,894 INFO L93 Difference]: Finished difference Result 1496 states and 1996 transitions. [2020-11-28 07:41:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:37,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-11-28 07:41:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:37,917 INFO L225 Difference]: With dead ends: 1496 [2020-11-28 07:41:37,917 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:41:37,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:41:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-28 07:41:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:41:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 954 transitions. [2020-11-28 07:41:37,947 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 954 transitions. Word has length 95 [2020-11-28 07:41:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:37,947 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 954 transitions. [2020-11-28 07:41:37,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 954 transitions. [2020-11-28 07:41:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-28 07:41:37,953 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:37,953 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:37,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:41:37,954 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1655711151, now seen corresponding path program 1 times [2020-11-28 07:41:37,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:37,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395103447] [2020-11-28 07:41:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:38,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395103447] [2020-11-28 07:41:38,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:38,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:41:38,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410717225] [2020-11-28 07:41:38,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:38,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:38,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:38,096 INFO L87 Difference]: Start difference. First operand 713 states and 954 transitions. Second operand 4 states. [2020-11-28 07:41:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:38,741 INFO L93 Difference]: Finished difference Result 1638 states and 2226 transitions. [2020-11-28 07:41:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:38,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-11-28 07:41:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:38,748 INFO L225 Difference]: With dead ends: 1638 [2020-11-28 07:41:38,748 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:41:38,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:41:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-28 07:41:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:41:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 948 transitions. [2020-11-28 07:41:38,793 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 948 transitions. Word has length 101 [2020-11-28 07:41:38,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:38,794 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 948 transitions. [2020-11-28 07:41:38,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 948 transitions. [2020-11-28 07:41:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-28 07:41:38,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:38,811 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:38,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:41:38,812 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:38,812 INFO L82 PathProgramCache]: Analyzing trace with hash 224023892, now seen corresponding path program 1 times [2020-11-28 07:41:38,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:38,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832511317] [2020-11-28 07:41:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 07:41:38,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832511317] [2020-11-28 07:41:38,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:38,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:38,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606707768] [2020-11-28 07:41:38,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:38,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:38,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:38,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:38,892 INFO L87 Difference]: Start difference. First operand 713 states and 948 transitions. Second operand 4 states. [2020-11-28 07:41:39,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:39,460 INFO L93 Difference]: Finished difference Result 1638 states and 2154 transitions. [2020-11-28 07:41:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:39,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-11-28 07:41:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:39,473 INFO L225 Difference]: With dead ends: 1638 [2020-11-28 07:41:39,473 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:41:39,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:41:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 855. [2020-11-28 07:41:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-28 07:41:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1109 transitions. [2020-11-28 07:41:39,504 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1109 transitions. Word has length 115 [2020-11-28 07:41:39,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:39,505 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1109 transitions. [2020-11-28 07:41:39,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:39,505 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1109 transitions. [2020-11-28 07:41:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-28 07:41:39,507 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:39,508 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:39,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:41:39,508 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1209429159, now seen corresponding path program 1 times [2020-11-28 07:41:39,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:39,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862079953] [2020-11-28 07:41:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 07:41:39,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862079953] [2020-11-28 07:41:39,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:39,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:39,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080932622] [2020-11-28 07:41:39,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:39,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:39,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:39,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:39,648 INFO L87 Difference]: Start difference. First operand 855 states and 1109 transitions. Second operand 3 states. [2020-11-28 07:41:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:39,998 INFO L93 Difference]: Finished difference Result 1922 states and 2468 transitions. [2020-11-28 07:41:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:39,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-11-28 07:41:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:40,005 INFO L225 Difference]: With dead ends: 1922 [2020-11-28 07:41:40,005 INFO L226 Difference]: Without dead ends: 1068 [2020-11-28 07:41:40,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-11-28 07:41:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2020-11-28 07:41:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:41:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1201 transitions. [2020-11-28 07:41:40,039 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1201 transitions. Word has length 132 [2020-11-28 07:41:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:40,039 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1201 transitions. [2020-11-28 07:41:40,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:40,039 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1201 transitions. [2020-11-28 07:41:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-28 07:41:40,042 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:40,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:40,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:41:40,043 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:40,044 INFO L82 PathProgramCache]: Analyzing trace with hash -585303537, now seen corresponding path program 1 times [2020-11-28 07:41:40,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:40,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941416093] [2020-11-28 07:41:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-28 07:41:40,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941416093] [2020-11-28 07:41:40,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:40,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:40,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482683938] [2020-11-28 07:41:40,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:40,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:40,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:40,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:40,218 INFO L87 Difference]: Start difference. First operand 926 states and 1201 transitions. Second operand 3 states. [2020-11-28 07:41:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:40,639 INFO L93 Difference]: Finished difference Result 2064 states and 2658 transitions. [2020-11-28 07:41:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:40,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2020-11-28 07:41:40,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:40,645 INFO L225 Difference]: With dead ends: 2064 [2020-11-28 07:41:40,645 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:41:40,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:41:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2020-11-28 07:41:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:41:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1357 transitions. [2020-11-28 07:41:40,679 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1357 transitions. Word has length 175 [2020-11-28 07:41:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:40,680 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1357 transitions. [2020-11-28 07:41:40,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1357 transitions. [2020-11-28 07:41:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-11-28 07:41:40,684 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:40,684 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:40,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:41:40,684 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:40,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1756891400, now seen corresponding path program 1 times [2020-11-28 07:41:40,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:40,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125989399] [2020-11-28 07:41:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 159 proven. 35 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-28 07:41:40,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125989399] [2020-11-28 07:41:40,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301115466] [2020-11-28 07:41:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:41,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:41,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-28 07:41:41,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-28 07:41:41,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:41,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:41:41,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254500679] [2020-11-28 07:41:41,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:41,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:41,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:41,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:41:41,417 INFO L87 Difference]: Start difference. First operand 1068 states and 1357 transitions. Second operand 3 states. [2020-11-28 07:41:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:41,867 INFO L93 Difference]: Finished difference Result 2561 states and 3277 transitions. [2020-11-28 07:41:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:41,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2020-11-28 07:41:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:41,876 INFO L225 Difference]: With dead ends: 2561 [2020-11-28 07:41:41,876 INFO L226 Difference]: Without dead ends: 1494 [2020-11-28 07:41:41,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:41:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-11-28 07:41:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1281. [2020-11-28 07:41:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-28 07:41:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1649 transitions. [2020-11-28 07:41:41,927 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1649 transitions. Word has length 188 [2020-11-28 07:41:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:41,928 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1649 transitions. [2020-11-28 07:41:41,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1649 transitions. [2020-11-28 07:41:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-28 07:41:41,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:41,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:42,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-28 07:41:42,150 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:42,151 INFO L82 PathProgramCache]: Analyzing trace with hash 15738918, now seen corresponding path program 1 times [2020-11-28 07:41:42,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:42,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949206955] [2020-11-28 07:41:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-28 07:41:42,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949206955] [2020-11-28 07:41:42,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:42,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:42,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263204173] [2020-11-28 07:41:42,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:42,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:42,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:42,404 INFO L87 Difference]: Start difference. First operand 1281 states and 1649 transitions. Second operand 3 states. [2020-11-28 07:41:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:42,958 INFO L93 Difference]: Finished difference Result 2845 states and 3645 transitions. [2020-11-28 07:41:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:42,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2020-11-28 07:41:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:42,966 INFO L225 Difference]: With dead ends: 2845 [2020-11-28 07:41:42,966 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:41:42,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:41:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2020-11-28 07:41:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:41:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1495 transitions. [2020-11-28 07:41:43,006 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1495 transitions. Word has length 197 [2020-11-28 07:41:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:43,007 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1495 transitions. [2020-11-28 07:41:43,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1495 transitions. [2020-11-28 07:41:43,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-28 07:41:43,011 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:43,012 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] [2020-11-28 07:41:43,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:41:43,012 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:43,013 INFO L82 PathProgramCache]: Analyzing trace with hash 413838098, now seen corresponding path program 1 times [2020-11-28 07:41:43,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:43,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315243784] [2020-11-28 07:41:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-11-28 07:41:43,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315243784] [2020-11-28 07:41:43,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212271883] [2020-11-28 07:41:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:43,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-28 07:41:43,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-28 07:41:43,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:43,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-28 07:41:43,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157632517] [2020-11-28 07:41:43,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:43,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:43,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:43,727 INFO L87 Difference]: Start difference. First operand 1210 states and 1495 transitions. Second operand 3 states. [2020-11-28 07:41:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:44,103 INFO L93 Difference]: Finished difference Result 2488 states and 3080 transitions. [2020-11-28 07:41:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:44,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-11-28 07:41:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:44,105 INFO L225 Difference]: With dead ends: 2488 [2020-11-28 07:41:44,105 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:41:44,107 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 [2020-11-28 07:41:44,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:41:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:41:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:41:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:41:44,108 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 216 [2020-11-28 07:41:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:44,108 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:41:44,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:41:44,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:41:44,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:41:44,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:41:44,709 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-11-28 07:41:44,956 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-11-28 07:41:44,959 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:41:44,960 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L542-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:41:44,961 INFO L274 CegarLoopResult]: For program point L545-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L546(line 546) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:41:44,962 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:41:44,963 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))) [2020-11-28 07:41:44,963 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:41:44,965 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:41:44,966 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:41:44,966 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:41:44,966 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:41:44,966 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:41:44,966 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:41:44,966 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:41:44,966 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:41:44,966 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:41:44,967 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:41:44,967 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:41:44,967 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:41:44,967 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:41:44,967 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:41:44,967 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:41:44,967 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:41:44,967 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:41:44,968 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:41:44,968 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:41:44,968 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:41:44,968 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:41:44,968 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:41:44,970 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))) [2020-11-28 07:41:44,970 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:41:44,970 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:41:44,970 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:41:44,970 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:41:44,971 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:41:44,971 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:41:44,971 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:41:44,971 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:41:45,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:45 BoogieIcfgContainer [2020-11-28 07:41:45,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:45,016 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:45,016 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:45,017 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:45,017 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:33" (3/4) ... [2020-11-28 07:41:45,020 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:41:45,047 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-28 07:41:45,055 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:41:45,056 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:41:45,058 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:41:45,223 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dd0bfbeb-75fc-4017-9a08-fb9e405cd72a/bin/utaipan/witness.graphml [2020-11-28 07:41:45,223 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:45,224 INFO L168 Benchmark]: Toolchain (without parser) took 14310.36 ms. Allocated memory was 94.4 MB in the beginning and 291.5 MB in the end (delta: 197.1 MB). Free memory was 63.5 MB in the beginning and 93.8 MB in the end (delta: -30.3 MB). Peak memory consumption was 167.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:45,224 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory is still 52.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:45,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 707.34 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 63.5 MB in the beginning and 72.5 MB in the end (delta: -9.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:45,225 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.21 ms. Allocated memory is still 113.2 MB. Free memory was 72.5 MB in the beginning and 66.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:45,225 INFO L168 Benchmark]: Boogie Preprocessor took 101.76 ms. Allocated memory is still 113.2 MB. Free memory was 66.8 MB in the beginning and 62.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:45,226 INFO L168 Benchmark]: RCFGBuilder took 2066.15 ms. Allocated memory was 113.2 MB in the beginning and 148.9 MB in the end (delta: 35.7 MB). Free memory was 62.6 MB in the beginning and 110.4 MB in the end (delta: -47.8 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:45,226 INFO L168 Benchmark]: TraceAbstraction took 11133.34 ms. Allocated memory was 148.9 MB in the beginning and 291.5 MB in the end (delta: 142.6 MB). Free memory was 110.4 MB in the beginning and 109.5 MB in the end (delta: 924.8 kB). Peak memory consumption was 143.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:45,227 INFO L168 Benchmark]: Witness Printer took 206.70 ms. Allocated memory is still 291.5 MB. Free memory was 109.5 MB in the beginning and 93.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:45,229 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory is still 52.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 707.34 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 63.5 MB in the beginning and 72.5 MB in the end (delta: -9.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.21 ms. Allocated memory is still 113.2 MB. Free memory was 72.5 MB in the beginning and 66.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 101.76 ms. Allocated memory is still 113.2 MB. Free memory was 66.8 MB in the beginning and 62.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2066.15 ms. Allocated memory was 113.2 MB in the beginning and 148.9 MB in the end (delta: 35.7 MB). Free memory was 62.6 MB in the beginning and 110.4 MB in the end (delta: -47.8 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11133.34 ms. Allocated memory was 148.9 MB in the beginning and 291.5 MB in the end (delta: 142.6 MB). Free memory was 110.4 MB in the beginning and 109.5 MB in the end (delta: 924.8 kB). Peak memory consumption was 143.5 MB. Max. memory is 16.1 GB. * Witness Printer took 206.70 ms. Allocated memory is still 291.5 MB. Free memory was 109.5 MB in the beginning and 93.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a16 == 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: 10.3s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 6.1s, 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, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 843 GetRequests, 818 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s 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: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.6s 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...