./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label45.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_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label45.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/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 6d4861c19654d56144743310eef6a7eb4ce70026 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:49:41,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:49:41,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:49:41,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:49:41,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:49:41,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:49:41,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:49:41,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:49:41,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:49:41,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:49:41,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:49:41,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:49:41,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:49:41,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:49:41,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:49:41,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:49:41,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:49:41,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:49:41,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:49:41,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:49:41,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:49:41,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:49:41,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:49:41,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:49:41,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:49:41,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:49:41,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:49:41,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:49:41,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:49:41,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:49:41,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:49:41,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:49:41,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:49:41,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:49:41,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:49:41,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:49:41,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:49:41,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:49:41,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:49:41,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:49:41,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:49:41,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:49:41,558 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:49:41,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:49:41,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:49:41,563 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:49:41,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:49:41,564 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:49:41,565 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:49:41,565 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:49:41,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:49:41,566 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:49:41,567 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:49:41,567 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:49:41,568 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:49:41,568 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:49:41,569 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:49:41,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:49:41,570 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:49:41,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:49:41,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:49:41,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:49:41,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:49:41,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:49:41,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:49:41,572 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:49:41,573 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:49:41,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:49:41,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:49:41,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:49:41,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:49:41,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:49:41,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:49:41,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:49:41,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:49:41,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:49:41,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:49:41,579 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:49:41,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:49:41,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:49:41,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:49:41,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:49:41,580 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_4c06d265-7190-43f9-b334-a18eb93f8149/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d4861c19654d56144743310eef6a7eb4ce70026 [2020-11-22 12:49:41,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:49:42,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:49:42,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:49:42,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:49:42,008 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:49:42,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label45.c [2020-11-22 12:49:42,087 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/data/a185419e6/8b329ac72f6447dda519e5b739af73a1/FLAG8c738c501 [2020-11-22 12:49:42,963 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:49:42,964 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/sv-benchmarks/c/eca-rers2012/Problem01_label45.c [2020-11-22 12:49:42,989 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/data/a185419e6/8b329ac72f6447dda519e5b739af73a1/FLAG8c738c501 [2020-11-22 12:49:43,142 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/data/a185419e6/8b329ac72f6447dda519e5b739af73a1 [2020-11-22 12:49:43,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:49:43,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:49:43,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:43,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:49:43,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:49:43,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:43" (1/1) ... [2020-11-22 12:49:43,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404c55f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:43, skipping insertion in model container [2020-11-22 12:49:43,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:43" (1/1) ... [2020-11-22 12:49:43,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:49:43,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:49:43,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:43,863 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:49:44,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:44,050 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:49:44,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44 WrapperNode [2020-11-22 12:49:44,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:44,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:44,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:49:44,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:49:44,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... [2020-11-22 12:49:44,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... [2020-11-22 12:49:44,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:44,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:49:44,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:49:44,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:49:44,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... [2020-11-22 12:49:44,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... [2020-11-22 12:49:44,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... [2020-11-22 12:49:44,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... [2020-11-22 12:49:44,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... [2020-11-22 12:49:44,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... [2020-11-22 12:49:44,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... [2020-11-22 12:49:44,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:49:44,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:49:44,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:49:44,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:49:44,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:49:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:49:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:49:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:49:44,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:49:47,626 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:49:47,627 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-22 12:49:47,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:47 BoogieIcfgContainer [2020-11-22 12:49:47,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:49:47,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:49:47,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:49:47,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:49:47,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:49:43" (1/3) ... [2020-11-22 12:49:47,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792607a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:47, skipping insertion in model container [2020-11-22 12:49:47,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:44" (2/3) ... [2020-11-22 12:49:47,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792607a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:47, skipping insertion in model container [2020-11-22 12:49:47,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:47" (3/3) ... [2020-11-22 12:49:47,648 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label45.c [2020-11-22 12:49:47,661 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:49:47,668 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:49:47,683 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 12:49:47,731 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:49:47,732 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:49:47,732 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:49:47,732 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:49:47,732 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:49:47,733 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:49:47,733 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:49:47,733 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:49:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-22 12:49:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-22 12:49:47,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:47,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:47,772 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:47,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2004387116, now seen corresponding path program 1 times [2020-11-22 12:49:47,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:47,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455304294] [2020-11-22 12:49:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:48,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455304294] [2020-11-22 12:49:48,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:48,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:49:48,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784873549] [2020-11-22 12:49:48,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:48,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:48,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:48,365 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-22 12:49:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:49,153 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-22 12:49:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:49,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-22 12:49:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:49,186 INFO L225 Difference]: With dead ends: 224 [2020-11-22 12:49:49,186 INFO L226 Difference]: Without dead ends: 145 [2020-11-22 12:49:49,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-22 12:49:49,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-22 12:49:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-22 12:49:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-22 12:49:49,249 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-22 12:49:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:49,250 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-22 12:49:49,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-22 12:49:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-22 12:49:49,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:49,256 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-11-22 12:49:49,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:49:49,257 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1836067938, now seen corresponding path program 1 times [2020-11-22 12:49:49,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:49,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972107651] [2020-11-22 12:49:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:49,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972107651] [2020-11-22 12:49:49,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:49,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:49:49,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916226215] [2020-11-22 12:49:49,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:49,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:49,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:49,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:49,348 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-22 12:49:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:49,996 INFO L93 Difference]: Finished difference Result 433 states and 775 transitions. [2020-11-22 12:49:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:49,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-11-22 12:49:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:50,001 INFO L225 Difference]: With dead ends: 433 [2020-11-22 12:49:50,002 INFO L226 Difference]: Without dead ends: 289 [2020-11-22 12:49:50,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-22 12:49:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2020-11-22 12:49:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-22 12:49:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 480 transitions. [2020-11-22 12:49:50,067 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 480 transitions. Word has length 76 [2020-11-22 12:49:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:50,068 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 480 transitions. [2020-11-22 12:49:50,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 480 transitions. [2020-11-22 12:49:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-22 12:49:50,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:50,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:50,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:49:50,080 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1189852968, now seen corresponding path program 1 times [2020-11-22 12:49:50,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:50,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259702795] [2020-11-22 12:49:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:50,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259702795] [2020-11-22 12:49:50,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:50,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:49:50,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605955137] [2020-11-22 12:49:50,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:50,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:50,244 INFO L87 Difference]: Start difference. First operand 287 states and 480 transitions. Second operand 3 states. [2020-11-22 12:49:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:50,844 INFO L93 Difference]: Finished difference Result 857 states and 1437 transitions. [2020-11-22 12:49:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:50,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-11-22 12:49:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:50,851 INFO L225 Difference]: With dead ends: 857 [2020-11-22 12:49:50,851 INFO L226 Difference]: Without dead ends: 571 [2020-11-22 12:49:50,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-22 12:49:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-11-22 12:49:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-22 12:49:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 884 transitions. [2020-11-22 12:49:50,915 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 884 transitions. Word has length 80 [2020-11-22 12:49:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:50,917 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 884 transitions. [2020-11-22 12:49:50,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 884 transitions. [2020-11-22 12:49:50,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-22 12:49:50,921 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:50,921 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:50,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:49:50,922 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:50,923 INFO L82 PathProgramCache]: Analyzing trace with hash -378671215, now seen corresponding path program 1 times [2020-11-22 12:49:50,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:50,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829485717] [2020-11-22 12:49:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:51,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829485717] [2020-11-22 12:49:51,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:51,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:49:51,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749555795] [2020-11-22 12:49:51,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:51,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:51,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:51,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:51,071 INFO L87 Difference]: Start difference. First operand 571 states and 884 transitions. Second operand 4 states. [2020-11-22 12:49:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:52,053 INFO L93 Difference]: Finished difference Result 1425 states and 2183 transitions. [2020-11-22 12:49:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:52,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-22 12:49:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:52,061 INFO L225 Difference]: With dead ends: 1425 [2020-11-22 12:49:52,061 INFO L226 Difference]: Without dead ends: 855 [2020-11-22 12:49:52,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-11-22 12:49:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 713. [2020-11-22 12:49:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-22 12:49:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1056 transitions. [2020-11-22 12:49:52,106 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1056 transitions. Word has length 83 [2020-11-22 12:49:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:52,107 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1056 transitions. [2020-11-22 12:49:52,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1056 transitions. [2020-11-22 12:49:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-22 12:49:52,110 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:52,110 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:52,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:49:52,112 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1636236894, now seen corresponding path program 1 times [2020-11-22 12:49:52,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:52,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668796965] [2020-11-22 12:49:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:52,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668796965] [2020-11-22 12:49:52,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:52,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:49:52,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849978361] [2020-11-22 12:49:52,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:52,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:52,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:52,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:52,213 INFO L87 Difference]: Start difference. First operand 713 states and 1056 transitions. Second operand 3 states. [2020-11-22 12:49:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:52,871 INFO L93 Difference]: Finished difference Result 1922 states and 2886 transitions. [2020-11-22 12:49:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:52,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-11-22 12:49:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:52,881 INFO L225 Difference]: With dead ends: 1922 [2020-11-22 12:49:52,882 INFO L226 Difference]: Without dead ends: 1210 [2020-11-22 12:49:52,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-22 12:49:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2020-11-22 12:49:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-22 12:49:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1510 transitions. [2020-11-22 12:49:52,921 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1510 transitions. Word has length 84 [2020-11-22 12:49:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:52,922 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1510 transitions. [2020-11-22 12:49:52,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1510 transitions. [2020-11-22 12:49:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-22 12:49:52,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:52,926 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:52,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:49:52,926 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2076621605, now seen corresponding path program 1 times [2020-11-22 12:49:52,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:52,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766479107] [2020-11-22 12:49:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-22 12:49:53,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766479107] [2020-11-22 12:49:53,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:53,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:49:53,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147830056] [2020-11-22 12:49:53,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:53,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:53,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:53,027 INFO L87 Difference]: Start difference. First operand 997 states and 1510 transitions. Second operand 3 states. [2020-11-22 12:49:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:53,593 INFO L93 Difference]: Finished difference Result 2206 states and 3304 transitions. [2020-11-22 12:49:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:53,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-11-22 12:49:53,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:53,612 INFO L225 Difference]: With dead ends: 2206 [2020-11-22 12:49:53,613 INFO L226 Difference]: Without dead ends: 1210 [2020-11-22 12:49:53,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-22 12:49:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2020-11-22 12:49:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-22 12:49:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1741 transitions. [2020-11-22 12:49:53,652 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1741 transitions. Word has length 87 [2020-11-22 12:49:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:53,652 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1741 transitions. [2020-11-22 12:49:53,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1741 transitions. [2020-11-22 12:49:53,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-22 12:49:53,656 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:53,657 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:53,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 12:49:53,657 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:53,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1813933205, now seen corresponding path program 1 times [2020-11-22 12:49:53,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:53,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664388262] [2020-11-22 12:49:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-22 12:49:53,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664388262] [2020-11-22 12:49:53,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:53,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:49:53,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881166838] [2020-11-22 12:49:53,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:53,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:53,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:53,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:53,730 INFO L87 Difference]: Start difference. First operand 1210 states and 1741 transitions. Second operand 4 states. [2020-11-22 12:49:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:54,597 INFO L93 Difference]: Finished difference Result 2490 states and 3570 transitions. [2020-11-22 12:49:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:54,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-11-22 12:49:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:54,607 INFO L225 Difference]: With dead ends: 2490 [2020-11-22 12:49:54,607 INFO L226 Difference]: Without dead ends: 1281 [2020-11-22 12:49:54,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-22 12:49:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1139. [2020-11-22 12:49:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-22 12:49:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1598 transitions. [2020-11-22 12:49:54,680 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1598 transitions. Word has length 91 [2020-11-22 12:49:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:54,681 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1598 transitions. [2020-11-22 12:49:54,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1598 transitions. [2020-11-22 12:49:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-22 12:49:54,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:54,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:54,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 12:49:54,686 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:54,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1327630118, now seen corresponding path program 1 times [2020-11-22 12:49:54,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:54,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620025354] [2020-11-22 12:49:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:54,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620025354] [2020-11-22 12:49:54,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:54,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:49:54,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541448003] [2020-11-22 12:49:54,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:54,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:54,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:54,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:54,797 INFO L87 Difference]: Start difference. First operand 1139 states and 1598 transitions. Second operand 3 states. [2020-11-22 12:49:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:55,344 INFO L93 Difference]: Finished difference Result 2490 states and 3438 transitions. [2020-11-22 12:49:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:55,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-11-22 12:49:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:55,355 INFO L225 Difference]: With dead ends: 2490 [2020-11-22 12:49:55,355 INFO L226 Difference]: Without dead ends: 1210 [2020-11-22 12:49:55,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-22 12:49:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2020-11-22 12:49:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-22 12:49:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1495 transitions. [2020-11-22 12:49:55,399 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1495 transitions. Word has length 100 [2020-11-22 12:49:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:55,399 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1495 transitions. [2020-11-22 12:49:55,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1495 transitions. [2020-11-22 12:49:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-22 12:49:55,403 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:55,403 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:55,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 12:49:55,403 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:55,404 INFO L82 PathProgramCache]: Analyzing trace with hash 137936300, now seen corresponding path program 1 times [2020-11-22 12:49:55,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:55,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942409036] [2020-11-22 12:49:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:55,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942409036] [2020-11-22 12:49:55,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121588819] [2020-11-22 12:49:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 12:49:55,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-22 12:49:55,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-22 12:49:55,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:49:55,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-11-22 12:49:55,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122342554] [2020-11-22 12:49:55,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:55,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:55,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:49:55,902 INFO L87 Difference]: Start difference. First operand 1210 states and 1495 transitions. Second operand 3 states. [2020-11-22 12:49:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:56,530 INFO L93 Difference]: Finished difference Result 2774 states and 3461 transitions. [2020-11-22 12:49:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:56,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-11-22 12:49:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:56,543 INFO L225 Difference]: With dead ends: 2774 [2020-11-22 12:49:56,544 INFO L226 Difference]: Without dead ends: 1565 [2020-11-22 12:49:56,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:49:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2020-11-22 12:49:56,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2020-11-22 12:49:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2020-11-22 12:49:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1920 transitions. [2020-11-22 12:49:56,632 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1920 transitions. Word has length 104 [2020-11-22 12:49:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:56,634 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1920 transitions. [2020-11-22 12:49:56,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1920 transitions. [2020-11-22 12:49:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-22 12:49:56,639 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:56,639 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1] [2020-11-22 12:49:56,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-22 12:49:56,859 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash 309886299, now seen corresponding path program 1 times [2020-11-22 12:49:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:56,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586992691] [2020-11-22 12:49:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-22 12:49:56,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586992691] [2020-11-22 12:49:56,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57933540] [2020-11-22 12:49:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 12:49:57,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-22 12:49:57,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-22 12:49:57,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:49:57,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-11-22 12:49:57,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450404100] [2020-11-22 12:49:57,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:57,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:49:57,273 INFO L87 Difference]: Start difference. First operand 1565 states and 1920 transitions. Second operand 3 states. [2020-11-22 12:49:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:57,854 INFO L93 Difference]: Finished difference Result 3342 states and 4071 transitions. [2020-11-22 12:49:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:57,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-11-22 12:49:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:57,867 INFO L225 Difference]: With dead ends: 3342 [2020-11-22 12:49:57,867 INFO L226 Difference]: Without dead ends: 1778 [2020-11-22 12:49:57,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:49:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-11-22 12:49:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1707. [2020-11-22 12:49:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-11-22 12:49:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2025 transitions. [2020-11-22 12:49:57,922 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2025 transitions. Word has length 120 [2020-11-22 12:49:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:57,923 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2025 transitions. [2020-11-22 12:49:57,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2025 transitions. [2020-11-22 12:49:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-22 12:49:57,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:57,928 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-11-22 12:49:58,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-22 12:49:58,155 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:58,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:58,155 INFO L82 PathProgramCache]: Analyzing trace with hash 731771927, now seen corresponding path program 1 times [2020-11-22 12:49:58,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:58,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68051556] [2020-11-22 12:49:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-11-22 12:49:58,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68051556] [2020-11-22 12:49:58,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:58,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:49:58,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098968584] [2020-11-22 12:49:58,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:58,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:58,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:58,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:58,332 INFO L87 Difference]: Start difference. First operand 1707 states and 2025 transitions. Second operand 3 states. [2020-11-22 12:49:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:58,900 INFO L93 Difference]: Finished difference Result 3910 states and 4672 transitions. [2020-11-22 12:49:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:49:58,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-11-22 12:49:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:58,916 INFO L225 Difference]: With dead ends: 3910 [2020-11-22 12:49:58,916 INFO L226 Difference]: Without dead ends: 2204 [2020-11-22 12:49:58,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:49:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2020-11-22 12:49:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1920. [2020-11-22 12:49:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1920 states. [2020-11-22 12:49:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 2293 transitions. [2020-11-22 12:49:58,999 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 2293 transitions. Word has length 121 [2020-11-22 12:49:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:58,999 INFO L481 AbstractCegarLoop]: Abstraction has 1920 states and 2293 transitions. [2020-11-22 12:49:58,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:49:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 2293 transitions. [2020-11-22 12:49:59,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-11-22 12:49:59,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:59,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:59,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 12:49:59,008 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1064400062, now seen corresponding path program 1 times [2020-11-22 12:49:59,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:59,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751917038] [2020-11-22 12:49:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-11-22 12:49:59,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751917038] [2020-11-22 12:49:59,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046557550] [2020-11-22 12:49:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:59,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 12:49:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-22 12:49:59,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-22 12:49:59,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:49:59,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-11-22 12:49:59,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678526685] [2020-11-22 12:49:59,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:49:59,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:49:59,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:49:59,555 INFO L87 Difference]: Start difference. First operand 1920 states and 2293 transitions. Second operand 3 states. [2020-11-22 12:50:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:50:00,078 INFO L93 Difference]: Finished difference Result 4121 states and 4915 transitions. [2020-11-22 12:50:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:50:00,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2020-11-22 12:50:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:50:00,080 INFO L225 Difference]: With dead ends: 4121 [2020-11-22 12:50:00,080 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:50:00,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:50:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:50:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:50:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:50:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:50:00,086 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2020-11-22 12:50:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:50:00,086 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:50:00,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:50:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:50:00,087 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:50:00,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-22 12:50:00,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:50:00,646 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2020-11-22 12:50:00,650 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-22 12:50:00,651 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-22 12:50:00,651 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-22 12:50:00,651 INFO L274 CegarLoopResult]: For program point L533-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 12:50:00,651 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-22 12:50:00,652 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-22 12:50:00,652 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-22 12:50:00,652 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-22 12:50:00,652 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-22 12:50:00,652 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-22 12:50:00,652 INFO L274 CegarLoopResult]: For program point L536-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 12:50:00,653 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-22 12:50:00,654 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-22 12:50:00,655 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-22 12:50:00,655 INFO L274 CegarLoopResult]: For program point L537(line 537) no Hoare annotation was computed. [2020-11-22 12:50:00,655 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-22 12:50:00,655 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-22 12:50:00,655 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-22 12:50:00,656 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-22 12:50:00,656 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-22 12:50:00,656 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-22 12:50:00,656 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-22 12:50:00,657 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-22 12:50:00,657 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-22 12:50:00,659 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-22 12:50:00,659 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-22 12:50:00,660 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-22 12:50:00,660 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-22 12:50:00,660 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-22 12:50:00,660 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-22 12:50:00,660 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-22 12:50:00,660 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-22 12:50:00,661 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-22 12:50:00,661 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-22 12:50:00,661 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-22 12:50:00,661 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-22 12:50:00,661 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-22 12:50:00,661 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-22 12:50:00,662 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-22 12:50:00,663 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:50:00,663 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-22 12:50:00,664 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-22 12:50:00,664 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-22 12:50:00,664 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a20~0 1))) (or (and .cse0 (= ~a17~0 1)) (and (<= 14 ~a8~0) (<= ~a16~0 5)) (<= ~a16~0 4) (and (<= 6 ~a16~0) .cse0) (<= 15 ~a8~0))) [2020-11-22 12:50:00,665 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-22 12:50:00,665 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-22 12:50:00,665 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-22 12:50:00,666 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-22 12:50:00,666 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-22 12:50:00,666 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-22 12:50:00,666 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-22 12:50:00,666 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:50:00,666 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-22 12:50:00,667 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-22 12:50:00,667 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-22 12:50:00,667 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-22 12:50:00,667 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-22 12:50:00,667 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-22 12:50:00,668 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-22 12:50:00,668 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-22 12:50:00,668 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-22 12:50:00,668 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-22 12:50:00,668 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-22 12:50:00,668 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-22 12:50:00,669 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-22 12:50:00,669 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-22 12:50:00,669 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-22 12:50:00,671 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a20~0 1))) (or (and .cse0 (= ~a17~0 1)) (and (<= 14 ~a8~0) (<= ~a16~0 5)) (<= ~a16~0 4) (and (<= 6 ~a16~0) .cse0) (<= 15 ~a8~0))) [2020-11-22 12:50:00,672 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-22 12:50:00,672 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 12:50:00,672 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-22 12:50:00,673 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-22 12:50:00,673 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-22 12:50:00,673 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-22 12:50:00,673 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-22 12:50:00,673 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-22 12:50:00,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:50:00 BoogieIcfgContainer [2020-11-22 12:50:00,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:50:00,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:50:00,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:50:00,705 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:50:00,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:47" (3/4) ... [2020-11-22 12:50:00,709 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:50:00,762 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-22 12:50:00,765 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-22 12:50:00,767 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-22 12:50:00,770 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 12:50:00,979 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4c06d265-7190-43f9-b334-a18eb93f8149/bin/utaipan/witness.graphml [2020-11-22 12:50:00,979 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:50:00,981 INFO L168 Benchmark]: Toolchain (without parser) took 17830.14 ms. Allocated memory was 117.4 MB in the beginning and 287.3 MB in the end (delta: 169.9 MB). Free memory was 85.1 MB in the beginning and 120.0 MB in the end (delta: -34.9 MB). Peak memory consumption was 135.0 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:00,982 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 79.7 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 39.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:50:00,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 896.77 ms. Allocated memory is still 117.4 MB. Free memory was 85.1 MB in the beginning and 76.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:00,983 INFO L168 Benchmark]: Boogie Procedure Inliner took 133.63 ms. Allocated memory is still 117.4 MB. Free memory was 76.3 MB in the beginning and 70.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:00,984 INFO L168 Benchmark]: Boogie Preprocessor took 126.05 ms. Allocated memory is still 117.4 MB. Free memory was 70.9 MB in the beginning and 66.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:00,985 INFO L168 Benchmark]: RCFGBuilder took 3315.65 ms. Allocated memory was 117.4 MB in the beginning and 165.7 MB in the end (delta: 48.2 MB). Free memory was 66.3 MB in the beginning and 124.0 MB in the end (delta: -57.7 MB). Peak memory consumption was 74.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:00,985 INFO L168 Benchmark]: TraceAbstraction took 13069.10 ms. Allocated memory was 165.7 MB in the beginning and 287.3 MB in the end (delta: 121.6 MB). Free memory was 123.0 MB in the beginning and 135.7 MB in the end (delta: -12.8 MB). Peak memory consumption was 108.9 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:00,986 INFO L168 Benchmark]: Witness Printer took 275.19 ms. Allocated memory is still 287.3 MB. Free memory was 135.7 MB in the beginning and 120.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:50:00,988 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 79.7 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 39.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 896.77 ms. Allocated memory is still 117.4 MB. Free memory was 85.1 MB in the beginning and 76.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 133.63 ms. Allocated memory is still 117.4 MB. Free memory was 76.3 MB in the beginning and 70.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 126.05 ms. Allocated memory is still 117.4 MB. Free memory was 70.9 MB in the beginning and 66.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3315.65 ms. Allocated memory was 117.4 MB in the beginning and 165.7 MB in the end (delta: 48.2 MB). Free memory was 66.3 MB in the beginning and 124.0 MB in the end (delta: -57.7 MB). Peak memory consumption was 74.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13069.10 ms. Allocated memory was 165.7 MB in the beginning and 287.3 MB in the end (delta: 121.6 MB). Free memory was 123.0 MB in the beginning and 135.7 MB in the end (delta: -12.8 MB). Peak memory consumption was 108.9 MB. Max. memory is 16.1 GB. * Witness Printer took 275.19 ms. Allocated memory is still 287.3 MB. Free memory was 135.7 MB in the beginning and 120.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((a20 == 1 && a17 == 1) || (14 <= a8 && a16 <= 5)) || a16 <= 4) || (6 <= a16 && a20 == 1)) || 15 <= a8 - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((a20 == 1 && a17 == 1) || (14 <= a8 && a16 <= 5)) || a16 <= 4) || (6 <= a16 && a20 == 1)) || 15 <= a8 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.5s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 577 SDtfs, 784 SDslu, 54 SDs, 0 SdLazy, 2737 SolverSat, 734 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 818 GetRequests, 795 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1920occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 12 MinimizatonAttempts, 854 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 71 NumberOfFragments, 57 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2338 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 96 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 1587 NumberOfCodeBlocks, 1587 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1966 ConstructedInterpolants, 0 QuantifiedInterpolants, 500088 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1052 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 909/918 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...