./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label58.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label58.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/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 a3d221c588c349503d67f0a66f4914e82b09d7a1 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:46:03,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:46:03,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:46:03,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:46:03,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:46:03,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:46:03,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:46:03,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:46:03,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:46:03,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:46:04,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:46:04,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:46:04,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:46:04,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:46:04,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:46:04,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:46:04,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:46:04,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:46:04,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:46:04,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:46:04,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:46:04,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:46:04,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:46:04,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:46:04,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:46:04,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:46:04,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:46:04,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:46:04,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:46:04,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:46:04,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:46:04,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:46:04,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:46:04,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:46:04,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:46:04,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:46:04,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:46:04,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:46:04,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:46:04,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:46:04,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:46:04,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 09:46:04,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:46:04,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:46:04,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:46:04,053 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:46:04,054 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:46:04,054 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:46:04,054 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:46:04,054 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:46:04,054 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:46:04,055 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:46:04,055 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:46:04,055 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:46:04,055 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:46:04,055 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:46:04,055 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:46:04,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:46:04,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:46:04,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:46:04,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:46:04,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:46:04,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:46:04,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:46:04,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:46:04,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:46:04,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:46:04,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:46:04,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:46:04,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:46:04,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:46:04,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:46:04,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:46:04,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:46:04,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:46:04,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:46:04,059 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:46:04,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:46:04,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:46:04,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:46:04,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:46:04,060 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_9d2793f1-b174-452b-850e-0064815ecc53/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3d221c588c349503d67f0a66f4914e82b09d7a1 [2020-12-09 09:46:04,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:46:04,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:46:04,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:46:04,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:46:04,262 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:46:04,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label58.c [2020-12-09 09:46:04,304 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/data/81d186204/550e99d702c44b4d9ea989346f443546/FLAG913271f4e [2020-12-09 09:46:04,727 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:46:04,728 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/sv-benchmarks/c/eca-rers2012/Problem01_label58.c [2020-12-09 09:46:04,737 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/data/81d186204/550e99d702c44b4d9ea989346f443546/FLAG913271f4e [2020-12-09 09:46:04,747 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/data/81d186204/550e99d702c44b4d9ea989346f443546 [2020-12-09 09:46:04,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:46:04,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:46:04,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:46:04,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:46:04,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:46:04,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:46:04" (1/1) ... [2020-12-09 09:46:04,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a0591a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:04, skipping insertion in model container [2020-12-09 09:46:04,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:46:04" (1/1) ... [2020-12-09 09:46:04,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:46:04,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:46:05,006 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/sv-benchmarks/c/eca-rers2012/Problem01_label58.c[17861,17874] [2020-12-09 09:46:05,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:46:05,037 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:46:05,090 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/sv-benchmarks/c/eca-rers2012/Problem01_label58.c[17861,17874] [2020-12-09 09:46:05,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:46:05,111 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:46:05,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05 WrapperNode [2020-12-09 09:46:05,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:46:05,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:46:05,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:46:05,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:46:05,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... [2020-12-09 09:46:05,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... [2020-12-09 09:46:05,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:46:05,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:46:05,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:46:05,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:46:05,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... [2020-12-09 09:46:05,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... [2020-12-09 09:46:05,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... [2020-12-09 09:46:05,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... [2020-12-09 09:46:05,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... [2020-12-09 09:46:05,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... [2020-12-09 09:46:05,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... [2020-12-09 09:46:05,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:46:05,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:46:05,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:46:05,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:46:05,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:46:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:46:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:46:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:46:05,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:46:06,499 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:46:06,500 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 09:46:06,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:46:06 BoogieIcfgContainer [2020-12-09 09:46:06,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:46:06,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:46:06,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:46:06,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:46:06,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:46:04" (1/3) ... [2020-12-09 09:46:06,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11458851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:46:06, skipping insertion in model container [2020-12-09 09:46:06,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:46:05" (2/3) ... [2020-12-09 09:46:06,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11458851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:46:06, skipping insertion in model container [2020-12-09 09:46:06,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:46:06" (3/3) ... [2020-12-09 09:46:06,509 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label58.c [2020-12-09 09:46:06,519 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:46:06,521 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:46:06,529 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:46:06,546 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:46:06,546 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:46:06,546 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:46:06,546 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:46:06,546 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:46:06,546 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:46:06,546 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:46:06,546 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:46:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-12-09 09:46:06,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-09 09:46:06,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:06,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:46:06,563 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1806912344, now seen corresponding path program 1 times [2020-12-09 09:46:06,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:06,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216816975] [2020-12-09 09:46:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:46:06,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216816975] [2020-12-09 09:46:06,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:46:06,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:46:06,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292661422] [2020-12-09 09:46:06,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:46:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:06,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:46:06,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:06,825 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-12-09 09:46:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:07,109 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-12-09 09:46:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:46:07,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-09 09:46:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:07,118 INFO L225 Difference]: With dead ends: 224 [2020-12-09 09:46:07,119 INFO L226 Difference]: Without dead ends: 145 [2020-12-09 09:46:07,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-09 09:46:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-09 09:46:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-09 09:46:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 271 transitions. [2020-12-09 09:46:07,154 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 271 transitions. Word has length 71 [2020-12-09 09:46:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:07,155 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 271 transitions. [2020-12-09 09:46:07,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:46:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 271 transitions. [2020-12-09 09:46:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-09 09:46:07,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:07,158 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] [2020-12-09 09:46:07,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:46:07,158 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:07,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1694595902, now seen corresponding path program 1 times [2020-12-09 09:46:07,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:07,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285525748] [2020-12-09 09:46:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:46:07,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285525748] [2020-12-09 09:46:07,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:46:07,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:46:07,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617066473] [2020-12-09 09:46:07,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:46:07,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:07,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:46:07,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:07,204 INFO L87 Difference]: Start difference. First operand 145 states and 271 transitions. Second operand 3 states. [2020-12-09 09:46:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:07,426 INFO L93 Difference]: Finished difference Result 433 states and 811 transitions. [2020-12-09 09:46:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:46:07,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-09 09:46:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:07,429 INFO L225 Difference]: With dead ends: 433 [2020-12-09 09:46:07,429 INFO L226 Difference]: Without dead ends: 289 [2020-12-09 09:46:07,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-09 09:46:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2020-12-09 09:46:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 09:46:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 504 transitions. [2020-12-09 09:46:07,447 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 504 transitions. Word has length 76 [2020-12-09 09:46:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:07,447 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 504 transitions. [2020-12-09 09:46:07,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:46:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 504 transitions. [2020-12-09 09:46:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-09 09:46:07,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:07,450 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] [2020-12-09 09:46:07,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 09:46:07,450 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:07,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:07,451 INFO L82 PathProgramCache]: Analyzing trace with hash -143902899, now seen corresponding path program 1 times [2020-12-09 09:46:07,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:07,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504781468] [2020-12-09 09:46:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:46:07,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504781468] [2020-12-09 09:46:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:46:07,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:46:07,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599223025] [2020-12-09 09:46:07,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:46:07,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:46:07,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:46:07,506 INFO L87 Difference]: Start difference. First operand 287 states and 504 transitions. Second operand 4 states. [2020-12-09 09:46:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:07,840 INFO L93 Difference]: Finished difference Result 999 states and 1753 transitions. [2020-12-09 09:46:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:46:07,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-09 09:46:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:07,844 INFO L225 Difference]: With dead ends: 999 [2020-12-09 09:46:07,844 INFO L226 Difference]: Without dead ends: 713 [2020-12-09 09:46:07,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:46:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-09 09:46:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2020-12-09 09:46:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-12-09 09:46:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1104 transitions. [2020-12-09 09:46:07,871 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1104 transitions. Word has length 83 [2020-12-09 09:46:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:07,871 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1104 transitions. [2020-12-09 09:46:07,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:46:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1104 transitions. [2020-12-09 09:46:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-09 09:46:07,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:07,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:46:07,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 09:46:07,874 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:07,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:07,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1140305115, now seen corresponding path program 1 times [2020-12-09 09:46:07,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:07,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101906822] [2020-12-09 09:46:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:46:07,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101906822] [2020-12-09 09:46:07,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:46:07,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:46:07,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899187170] [2020-12-09 09:46:07,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:46:07,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:46:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:07,922 INFO L87 Difference]: Start difference. First operand 713 states and 1104 transitions. Second operand 3 states. [2020-12-09 09:46:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:08,112 INFO L93 Difference]: Finished difference Result 1780 states and 2688 transitions. [2020-12-09 09:46:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:46:08,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-09 09:46:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:08,119 INFO L225 Difference]: With dead ends: 1780 [2020-12-09 09:46:08,119 INFO L226 Difference]: Without dead ends: 1068 [2020-12-09 09:46:08,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-12-09 09:46:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2020-12-09 09:46:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-12-09 09:46:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1359 transitions. [2020-12-09 09:46:08,148 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1359 transitions. Word has length 86 [2020-12-09 09:46:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:08,149 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1359 transitions. [2020-12-09 09:46:08,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:46:08,149 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1359 transitions. [2020-12-09 09:46:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-09 09:46:08,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:08,151 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] [2020-12-09 09:46:08,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 09:46:08,152 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:08,152 INFO L82 PathProgramCache]: Analyzing trace with hash -886287081, now seen corresponding path program 1 times [2020-12-09 09:46:08,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:08,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826299597] [2020-12-09 09:46:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 09:46:08,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826299597] [2020-12-09 09:46:08,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:46:08,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:46:08,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216093301] [2020-12-09 09:46:08,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:46:08,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:08,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:46:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:08,200 INFO L87 Difference]: Start difference. First operand 926 states and 1359 transitions. Second operand 3 states. [2020-12-09 09:46:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:08,434 INFO L93 Difference]: Finished difference Result 2206 states and 3296 transitions. [2020-12-09 09:46:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:46:08,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-09 09:46:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:08,439 INFO L225 Difference]: With dead ends: 2206 [2020-12-09 09:46:08,439 INFO L226 Difference]: Without dead ends: 1210 [2020-12-09 09:46:08,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-12-09 09:46:08,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1068. [2020-12-09 09:46:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-12-09 09:46:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1376 transitions. [2020-12-09 09:46:08,462 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1376 transitions. Word has length 87 [2020-12-09 09:46:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:08,462 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1376 transitions. [2020-12-09 09:46:08,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:46:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1376 transitions. [2020-12-09 09:46:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-09 09:46:08,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:08,464 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] [2020-12-09 09:46:08,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 09:46:08,465 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2120213199, now seen corresponding path program 1 times [2020-12-09 09:46:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:08,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149004816] [2020-12-09 09:46:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 09:46:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149004816] [2020-12-09 09:46:08,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:46:08,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:46:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596151351] [2020-12-09 09:46:08,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:46:08,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:46:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:46:08,510 INFO L87 Difference]: Start difference. First operand 1068 states and 1376 transitions. Second operand 4 states. [2020-12-09 09:46:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:08,777 INFO L93 Difference]: Finished difference Result 2206 states and 2837 transitions. [2020-12-09 09:46:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:46:08,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-12-09 09:46:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:08,781 INFO L225 Difference]: With dead ends: 2206 [2020-12-09 09:46:08,782 INFO L226 Difference]: Without dead ends: 1139 [2020-12-09 09:46:08,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:46:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-12-09 09:46:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-12-09 09:46:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-12-09 09:46:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1392 transitions. [2020-12-09 09:46:08,800 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1392 transitions. Word has length 91 [2020-12-09 09:46:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:08,800 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1392 transitions. [2020-12-09 09:46:08,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:46:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1392 transitions. [2020-12-09 09:46:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-09 09:46:08,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:08,802 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] [2020-12-09 09:46:08,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 09:46:08,803 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1622647623, now seen corresponding path program 1 times [2020-12-09 09:46:08,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:08,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15343169] [2020-12-09 09:46:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-09 09:46:08,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15343169] [2020-12-09 09:46:08,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:46:08,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:46:08,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272964150] [2020-12-09 09:46:08,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:46:08,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:08,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:46:08,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:46:08,865 INFO L87 Difference]: Start difference. First operand 1139 states and 1392 transitions. Second operand 4 states. [2020-12-09 09:46:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:09,132 INFO L93 Difference]: Finished difference Result 2277 states and 2783 transitions. [2020-12-09 09:46:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:46:09,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-12-09 09:46:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:09,136 INFO L225 Difference]: With dead ends: 2277 [2020-12-09 09:46:09,136 INFO L226 Difference]: Without dead ends: 1139 [2020-12-09 09:46:09,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:46:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-12-09 09:46:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-12-09 09:46:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-12-09 09:46:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1371 transitions. [2020-12-09 09:46:09,155 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1371 transitions. Word has length 120 [2020-12-09 09:46:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:09,156 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1371 transitions. [2020-12-09 09:46:09,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:46:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1371 transitions. [2020-12-09 09:46:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-09 09:46:09,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:09,158 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, 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] [2020-12-09 09:46:09,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 09:46:09,158 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash 408948414, now seen corresponding path program 1 times [2020-12-09 09:46:09,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:09,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387813738] [2020-12-09 09:46:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-09 09:46:09,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387813738] [2020-12-09 09:46:09,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:46:09,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:46:09,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682382489] [2020-12-09 09:46:09,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:46:09,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:09,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:46:09,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:09,224 INFO L87 Difference]: Start difference. First operand 1139 states and 1371 transitions. Second operand 3 states. [2020-12-09 09:46:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:09,449 INFO L93 Difference]: Finished difference Result 2561 states and 3087 transitions. [2020-12-09 09:46:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:46:09,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-09 09:46:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:09,455 INFO L225 Difference]: With dead ends: 2561 [2020-12-09 09:46:09,456 INFO L226 Difference]: Without dead ends: 1423 [2020-12-09 09:46:09,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-12-09 09:46:09,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1210. [2020-12-09 09:46:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-09 09:46:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1458 transitions. [2020-12-09 09:46:09,485 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1458 transitions. Word has length 137 [2020-12-09 09:46:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:09,486 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1458 transitions. [2020-12-09 09:46:09,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:46:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1458 transitions. [2020-12-09 09:46:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-09 09:46:09,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:09,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:46:09,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 09:46:09,489 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:09,490 INFO L82 PathProgramCache]: Analyzing trace with hash -785883155, now seen corresponding path program 1 times [2020-12-09 09:46:09,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:09,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269119625] [2020-12-09 09:46:09,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 09:46:09,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269119625] [2020-12-09 09:46:09,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:46:09,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:46:09,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224627280] [2020-12-09 09:46:09,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:46:09,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:09,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:46:09,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:09,585 INFO L87 Difference]: Start difference. First operand 1210 states and 1458 transitions. Second operand 3 states. [2020-12-09 09:46:09,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:09,768 INFO L93 Difference]: Finished difference Result 2632 states and 3147 transitions. [2020-12-09 09:46:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:46:09,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2020-12-09 09:46:09,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:09,775 INFO L225 Difference]: With dead ends: 2632 [2020-12-09 09:46:09,775 INFO L226 Difference]: Without dead ends: 1423 [2020-12-09 09:46:09,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:46:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-12-09 09:46:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1352. [2020-12-09 09:46:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-12-09 09:46:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1572 transitions. [2020-12-09 09:46:09,805 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1572 transitions. Word has length 164 [2020-12-09 09:46:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:09,805 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1572 transitions. [2020-12-09 09:46:09,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:46:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1572 transitions. [2020-12-09 09:46:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-09 09:46:09,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:09,809 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:46:09,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 09:46:09,809 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:09,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1506473394, now seen corresponding path program 1 times [2020-12-09 09:46:09,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:09,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117650428] [2020-12-09 09:46:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 134 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 09:46:09,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117650428] [2020-12-09 09:46:09,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096225761] [2020-12-09 09:46:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:46:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 09:46:10,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:46:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-09 09:46:10,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:46:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-09 09:46:10,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 09:46:10,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2020-12-09 09:46:10,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17905182] [2020-12-09 09:46:10,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:46:10,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:46:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:46:10,328 INFO L87 Difference]: Start difference. First operand 1352 states and 1572 transitions. Second operand 3 states. [2020-12-09 09:46:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:10,515 INFO L93 Difference]: Finished difference Result 3200 states and 3769 transitions. [2020-12-09 09:46:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:46:10,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2020-12-09 09:46:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:10,522 INFO L225 Difference]: With dead ends: 3200 [2020-12-09 09:46:10,522 INFO L226 Difference]: Without dead ends: 1849 [2020-12-09 09:46:10,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 351 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:46:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2020-12-09 09:46:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 997. [2020-12-09 09:46:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-12-09 09:46:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1191 transitions. [2020-12-09 09:46:10,541 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1191 transitions. Word has length 177 [2020-12-09 09:46:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:10,541 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1191 transitions. [2020-12-09 09:46:10,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:46:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1191 transitions. [2020-12-09 09:46:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-09 09:46:10,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:10,544 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-09 09:46:10,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-09 09:46:10,746 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash -194118184, now seen corresponding path program 1 times [2020-12-09 09:46:10,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:10,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983441465] [2020-12-09 09:46:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 253 proven. 35 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-12-09 09:46:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983441465] [2020-12-09 09:46:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835096942] [2020-12-09 09:46:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:46:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:11,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 09:46:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:46:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-09 09:46:11,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:46:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-09 09:46:11,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 09:46:11,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-12-09 09:46:11,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191056313] [2020-12-09 09:46:11,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:46:11,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:11,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:46:11,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:46:11,394 INFO L87 Difference]: Start difference. First operand 997 states and 1191 transitions. Second operand 3 states. [2020-12-09 09:46:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:11,551 INFO L93 Difference]: Finished difference Result 2277 states and 2763 transitions. [2020-12-09 09:46:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:46:11,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2020-12-09 09:46:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:11,556 INFO L225 Difference]: With dead ends: 2277 [2020-12-09 09:46:11,556 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 09:46:11,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 461 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:46:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 09:46:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1210. [2020-12-09 09:46:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-09 09:46:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1479 transitions. [2020-12-09 09:46:11,575 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1479 transitions. Word has length 232 [2020-12-09 09:46:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:11,575 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1479 transitions. [2020-12-09 09:46:11,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:46:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1479 transitions. [2020-12-09 09:46:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-09 09:46:11,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:46:11,578 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-09 09:46:11,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:46:11,780 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:46:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:46:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1646204528, now seen corresponding path program 1 times [2020-12-09 09:46:11,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:46:11,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828083683] [2020-12-09 09:46:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:46:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 236 proven. 142 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-09 09:46:12,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828083683] [2020-12-09 09:46:12,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722811317] [2020-12-09 09:46:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:46:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:46:12,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 09:46:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:46:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-09 09:46:12,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:46:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-09 09:46:12,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 09:46:12,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2020-12-09 09:46:12,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777133086] [2020-12-09 09:46:12,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:46:12,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:46:12,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:46:12,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:46:12,434 INFO L87 Difference]: Start difference. First operand 1210 states and 1479 transitions. Second operand 3 states. [2020-12-09 09:46:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:46:12,598 INFO L93 Difference]: Finished difference Result 2701 states and 3315 transitions. [2020-12-09 09:46:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:46:12,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-12-09 09:46:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:46:12,599 INFO L225 Difference]: With dead ends: 2701 [2020-12-09 09:46:12,599 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 09:46:12,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 480 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:46:12,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 09:46:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 09:46:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 09:46:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 09:46:12,601 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 241 [2020-12-09 09:46:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:46:12,601 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 09:46:12,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:46:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 09:46:12,601 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 09:46:12,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 09:46:12,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-12-09 09:46:12,913 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L479-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-12-09 09:46:12,914 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L482-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L483(line 483) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a16~0 6))) (or (and .cse0 (<= ~a8~0 13)) (<= ~a16~0 5) (and .cse0 (<= 15 ~a8~0)) (and (= ~a21~0 1) (= ~a20~0 1)))) [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-12-09 09:46:12,915 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a16~0 6))) (or (and .cse0 (<= ~a8~0 13)) (<= ~a16~0 5) (and .cse0 (<= 15 ~a8~0)) (and (= ~a21~0 1) (= ~a20~0 1)))) [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 483) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-12-09 09:46:12,916 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-12-09 09:46:12,917 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-12-09 09:46:12,917 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-12-09 09:46:12,917 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-12-09 09:46:12,917 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-12-09 09:46:12,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:46:12 BoogieIcfgContainer [2020-12-09 09:46:12,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:46:12,929 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:46:12,929 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:46:12,929 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:46:12,929 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:46:06" (3/4) ... [2020-12-09 09:46:12,931 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 09:46:12,946 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-12-09 09:46:12,947 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-12-09 09:46:12,949 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 09:46:12,950 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 09:46:13,035 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9d2793f1-b174-452b-850e-0064815ecc53/bin/utaipan/witness.graphml [2020-12-09 09:46:13,035 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:46:13,036 INFO L168 Benchmark]: Toolchain (without parser) took 8285.87 ms. Allocated memory was 117.4 MB in the beginning and 331.4 MB in the end (delta: 213.9 MB). Free memory was 78.8 MB in the beginning and 162.0 MB in the end (delta: -83.2 MB). Peak memory consumption was 131.0 MB. Max. memory is 16.1 GB. [2020-12-09 09:46:13,036 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 117.4 MB. Free memory is still 97.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:46:13,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.78 ms. Allocated memory is still 117.4 MB. Free memory was 78.6 MB in the beginning and 77.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 09:46:13,037 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.31 ms. Allocated memory is still 117.4 MB. Free memory was 77.3 MB in the beginning and 71.6 MB in the end (delta: 5.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:46:13,037 INFO L168 Benchmark]: Boogie Preprocessor took 43.13 ms. Allocated memory is still 117.4 MB. Free memory was 71.6 MB in the beginning and 66.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 09:46:13,037 INFO L168 Benchmark]: RCFGBuilder took 1293.63 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 66.9 MB in the beginning and 84.1 MB in the end (delta: -17.1 MB). Peak memory consumption was 47.3 MB. Max. memory is 16.1 GB. [2020-12-09 09:46:13,037 INFO L168 Benchmark]: TraceAbstraction took 6424.51 ms. Allocated memory was 142.6 MB in the beginning and 331.4 MB in the end (delta: 188.7 MB). Free memory was 84.1 MB in the beginning and 177.8 MB in the end (delta: -93.7 MB). Peak memory consumption was 94.0 MB. Max. memory is 16.1 GB. [2020-12-09 09:46:13,038 INFO L168 Benchmark]: Witness Printer took 106.36 ms. Allocated memory is still 331.4 MB. Free memory was 176.7 MB in the beginning and 162.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:46:13,039 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 117.4 MB. Free memory is still 97.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.78 ms. Allocated memory is still 117.4 MB. Free memory was 78.6 MB in the beginning and 77.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.31 ms. Allocated memory is still 117.4 MB. Free memory was 77.3 MB in the beginning and 71.6 MB in the end (delta: 5.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.13 ms. Allocated memory is still 117.4 MB. Free memory was 71.6 MB in the beginning and 66.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1293.63 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 66.9 MB in the beginning and 84.1 MB in the end (delta: -17.1 MB). Peak memory consumption was 47.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6424.51 ms. Allocated memory was 142.6 MB in the beginning and 331.4 MB in the end (delta: 188.7 MB). Free memory was 84.1 MB in the beginning and 177.8 MB in the end (delta: -93.7 MB). Peak memory consumption was 94.0 MB. Max. memory is 16.1 GB. * Witness Printer took 106.36 ms. Allocated memory is still 331.4 MB. Free memory was 176.7 MB in the beginning and 162.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 483]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((a16 == 6 && a8 <= 13) || a16 <= 5) || (a16 == 6 && 15 <= a8)) || (a21 == 1 && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((a16 == 6 && a8 <= 13) || a16 <= 5) || (a16 == 6 && 15 <= a8)) || (a21 == 1 && a20 == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.2s, OverallIterations: 12, TraceHistogramMax: 8, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 525 SDtfs, 908 SDslu, 56 SDs, 0 SdLazy, 2745 SolverSat, 702 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1333 GetRequests, 1303 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1352occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 1493 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 49 NumberOfFragments, 51 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3744 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 12 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 2215 NumberOfCodeBlocks, 2215 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2847 ConstructedInterpolants, 0 QuantifiedInterpolants, 1693720 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1477 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 3203/3415 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...